Caverns always give people some sense of mystery and adventure. The feeling of going deep underground, shocking at every step, and stunning everywhere is something that you can’t feel when climbing a mountain and visiting a garden. Compared to the south, there seem to be fewer karst caves in the north. If it is more famous, Shandong Yishui Underground Grand Canyon is one of them. The Yishui Underground Grand Canyon is more than 6000 meters long, half of which has been developed as a tourist line. The karst caves have been formed for a long time, about 65 to 230 million years ago. They developed from huge karst fissures and are one of the super large karst caves in my country. First, it is known as “the first hole of underground river rafting in China”, and it is also a national 5A-level tourist attraction. Walking into the cave from the shining world outside, you are instantly surrounded by a cool and refreshing atmosphere. The scene before you becomes mysterious because of the dimness, and with the intervention of the light, it slowly reveals a dreamlike illusion in front of people. The wonderful world is like a palace hidden underground. The stalactites and the canyon landscape in the cave are all natural, with a rough and unrestrained momentum, and each scenic spot has a name that matches the shape. The Kowloon Palace in front of you makes people feel as if they really have come to the East China Sea Dragon Palace. The dragon-shaped stalactites are impressive and lifelike. Walking in the canyon, sometimes the road is flat and spacious, sometimes narrow and cramped, sometimes up, sometimes down. Some stalactites are high above and far away, some are close and within reach. The lights show brilliant colors, red and orange, orange sprinkled with yellow, yellow with blue, blue with green, green with blue, blue Covered with purple, the walls of each square gorge are soaked with color, like an ambiguous color picture. The water flow under the feet is finely broken, and the sound of the water is long and clear, revealing the breath. The stalactites are spilled from above like a waterfall. They are obviously hard and shattered stones, but they have a flowing and elegant texture. The names of the landscape in the cave are full of fantasy and mythology, which cater to the mystery of the cave. The Kowloon Palace, the seals playing in the water, the thousand-year-old Ganoderma lucidum… really can be called the supernatural craftsmanship of nature. The more you walk in, the more you can feel the peculiar appearance of this cave kingdom. Not far away, the lights are dim, the shadows are drenched, and occasionally people’s voices are heard vaguely, very close, and seemingly far away. Gradually, the sound of the water became louder, and the 1000-meter rafting project developed by using the underground river water potential in the canyon. This is a well-deserved Internet celebrity project in the underground canyon. It was certified as the “longest cave rafting in China” by the Shanghai Great World Guinness Records Headquarters. Sitting on the drifting boat, climbing up and down along the uneven terrain, the wind speed is sandwiched by the water speed, and the bottom is ups and downs, which is thrilling and exciting. The boat stumbled and smashed into anything in the narrow river. Suddenly stormy waves, shoals and bad waters made people frightening. Suddenly, the still water was flowing deeply, calming people’s hearts, and having the leeway to calm down and take a look at the scenery on both sides. The stalactites in the cave are of different sizes, weird and strange shapes, and they are full of dreamlike colors. People always like to talk about the spirit of craftsmanship. If you look for it in nature, perhaps the cave is a manifestation of the spirit of craftsmanship in nature. The long years of meticulous carving and constant polishing have formed such a magical and magnificent scene. This kind of skill and determination is far beyond the reach of manpower. (You are welcome to like and leave a message in the comment area. For more exciting content, stay tuned / Failed Jinshi)

https://dulich.petrotimes.vn/ The Manhattan Bridge is a suspension bridge that spans the East River in New York City, connecting Manhattan with downtown Brooklyn at Flatbush Avenue. The total length of this bridge is 6,855 ft (2,089 m). The Golden Gate Bridge https://dulich.petrotimes.vn/ The Golden Gate Bridge is considered the gateway on the road from the Pacific Ocean into San Francisco Bay. The bridge is 2.7 km long, the distance between the spans is 1,280 meters, 67 meters above the water surface, and the two bridge towers have a height of 230 meters from the water surface. https://dulich.petrotimes.vn/ It is also a symbol of the whole country, comparable to the Statue of Liberty, the Empire State Building or the Grand Canyon. New River Gorge . Bridge https://dulich.petrotimes.vn/ The New River Gorge Bridge is a 3,030 feet (924 m) long steel arch bridge that spans the New River Gorge near Fayetteville, eastern United States. With an arch of 1,700 feet (518 m), the New River Gorge is the longest single-span arch bridge in the world. Arthur Ravenel Jr. Bridge https://dulich.petrotimes.vn/ Arthur Ravenel, Jr. The Bridge is the longest cable-stayed bridge in the Western Hemisphere, spanning the Cooper River. Tilikum Crossing https://dulich.petrotimes.vn/ A cable-stayed bridge that spans the Willamette River in Portland, Oregon. This is the first major bridge in the US designed to allow vehicular traffic, cyclists and pedestrians, but not cars. Royal Gorge Bridge https://dulich.petrotimes.vn/ A fairly popular tourist attraction near Canon City, the Royal Gorge Bridge is located across a craggy gorge, just above the Arkansas River. Royal Gorge Bridge is about 384 m long, 5.5 m wide, built in 1929 and took about seven months to complete. The bridge is located at an altitude of 291 m above the Arkansas River and holds the record for the tallest bridge in the United States. High Trestle Trail Bridge https://dulich.petrotimes.vn/ The High Trestle Trail is in the state of Iowa, located in the Des Moines River valley. The bridge has a splendid and unique architecture with illuminated steel beams representing a view through a mine shaft, reflecting the coal mining history of the local area. And when sunset falls, the illuminated steel beams are the best time to admire the beauty of this bridge. https://dulich.petrotimes.vn/ It is rated as one of the 8 most beautiful pedestrian bridges in the world. https://dulich.petrotimes.vn/

New Zealand is a popular destination for adventure tourism. Source: Getty Images When it comes to adventure travel, New Zealand always offers top-notch experiences. This is the birthplace of bungee jumping and the use of high-speed jet boats for river cruises. The country has beautiful hiking routes, along with kayaking and mountain biking experiences in breathtaking landscapes only found in New Zealand. Visitors should not miss the trek along the Te Araroa trail – one of the most attractive trekking routes in the world. America National parks in the US like the Grand Canyon are always ideal destinations. With a large area and diverse natural landscapes, it is not difficult for visitors to find a place to explore with outdoor activities in the US. Campgrounds, trails, and mountain ranges appear everywhere from the east coast to the west coast. Whether you are looking for shady forests, grasslands, beaches, plains, deserts… America has it all. Travel services in the US are also very professional, suppliers are always ready to support tourists, from ideation to building a complete itinerary. If you’re still confused between so many options, the easiest is to choose to explore a national park closest to you. Any national park in the US, be it Yosemite, Yellowstone or the Grand Canyon… can’t let you down. Australia Australia is a place visitors need to come back many times to be able to explore it all. Source: Getty Images Kangaroo Land offers a wide range of options for adventurous travelers, from scuba diving off the Gold Coast to biking across the Great Ocean or exploring remote areas. With so many landscapes to explore, Australia is a place visitors need to return to again and again with exciting and exhilarating experiences. The “lifetime” experience in Australia is diving to see the world’s largest Great Barrier Reef. This reef is considered a symbol of the state of Queensland, and is also one of the most famous places in Australia. Iceland Ice caves in Iceland. Source: Getty Images It is difficult to explore all of Iceland’s natural wonders. Here visitors can explore caves, kayak on the scenic shoreline, hike glaciers, and soak in hot springs after a day of riding in the waves. Iceland also possesses dramatic natural scenes, such as colorful geysers caused by geothermal effects or the aurora borealis shimmering in the night sky. One of the most fascinating adventures in Iceland is exploring the giant ice cave Vatnajökull Glacier – a destination unlike any other in the world. Nepal Crossing the Himalayas is the most fascinating experience in Nepal. Source: Getty Images Nepal is a familiar name in the plans of adventure travelers. Whether wandering the temples and streets of Kathmandu or exploring Chitwan National Park is great, it is the hiking and climbing that is most worthwhile. Owning the 8 highest peaks in the world, it is understandable that Nepal is the top choice of climbers, with routes like the Annapurna Circuit and Everest Base Camp. Crossing the Himalayas is definitely the most fascinating experience in Nepal. The fame and attraction of the Himalayas makes adventurers irresistible. Tanzania Mount Kilimanjaro is known as the “roof of Africa”. Source: Getty Images In Tanzania, there are two famous itineraries that any tourist wants to experience. The first is to learn about the wildlife in the Serengeti nature reserve. This is Tanzania’s most famous national park, where visitors can witness giant herds of antelope from hot air balloons. The second is a more difficult trip to conquer Mount Kilimanjaro, which is known as the “roof of Africa”. After hard journeys, head to Zanzibar Island right on the shores of the Indian Ocean to relax or continue to challenge yourself with diving trips. Morocco Camping in the desert in Morocco. Source: Getty Images Camping in the Sahara, hiking and mountain biking in the High Atlas or off-road driving through vast deserts are just a few of the things you can do in Morocco. In addition to adventure tourism activities, visitors also often spend time roaming the bustling and traditional neighborhoods of Marrakech or Casablanca. However, a trekking trip to the top of the highest mountain Toubkal in North Africa is still a journey not to be missed.

Glass bridge over the mountain, Longjing city, Jilin, China The world in general, and especially in China, is favoring the trend of building glass bridges in rugged mountainous areas to attract tourists who love adventurous experiences. But these glass bridges raise a lot of doubts about the level of safety, especially after the recent glass bridge was severely damaged by wind and storm in China recently. Glass bridge trend blooms, risks go hand in hand There is no organization that has statistics on the number of glass bridges in the world, but one thing is for sure, as tourism develops, the number of new glass bridges, with records of length and sophistication, is built in different places. where the terrain is difficult… more. In the West, there are some names such as Tower Bridge in London (UK), Skywalk Bridge in Grand Canyon (Arizona, USA…). In Asia, China is leading this trend with an estimated 60 glass bridges that have been built across the country of billions of people since 2016, according to the Earth Journal of the China Geological Museum. Even, many Chinese glass bridges entered the Guinness World Records. For example, the glass bridge at Tianmen Mountain, Zhangjiajie, 430m long, spanning two cliffs 300m deep, opened to visitors in 2016. At that time, this was the tallest and longest glass bridge in the world. Recently, this record was broken by the bridge in Qingyuan, Guangdong, China with a length of 526m. Vietnam is also not out of the trend of developing glass bridges with the names of Dragon Cloud Bridge in Sapa and Love Bridge in Moc Chau… However, since this trend has blossomed, China has witnessed a lot of incidents that threaten the lives of tourists, making the people of this country in particular and the world question the level of safety. Recently, on May 7, stormy winds damaged the suspension bridge on Mount Piyan (Longjing City, Jilin Province), many of the bridge’s glass panels were cracked, some were even swept away, causing a tourist stuck, trembling, clinging to the bridge wall in front of winds up to 150km/h. Although the guest in trouble was safely brought down by the rescue team, checked for health and psychology and did not cause any other consequences, local authorities decided to close the bridge and conduct a comprehensive inspection. The entire incident was recorded by nearby tourists and posted on social media, raising concerns about the safety of glass bridges across China. “Too many glass bridges have been built in the last few years to serve tourists, but how can we ensure the safety of these structures?” said a doctor surnamed Li in Sichuan province. question. What are the technical standards and operation of the glass bridge? Photos of tourists stuck on the glass bridge According to Xinhua, many local governments of this country have published guidelines to ensure glass safety since 2018. In particular, Hubei province has published a set of technical standards for bridges and roads for people walk in glass at attractions, clearly stating instructions on materials, location, design, construction as well as operating procedures. For example, glass bridges should not be built in places where earthquakes often occur, must be closed during bad weather or natural disasters, and limit the number of people on the bridge to no more than 3 people/m2. In potentially hazardous locations, the bridge management must provide additional protective equipment, install warning signs in Chinese and at least 1 foreign language. Around the world, according to Paul Bingham, a materials scientist at Sheffield Hallam University (UK), designers and architects always think very carefully before choosing materials. “If using glass as a building material, there will be two weaknesses. The first is glass, which is fragile. The second is that the glass has no crystals, so if there is a crack on the surface, it will quickly spread and be difficult to restore,” said Paul Bingham. Therefore, a lot of research on glass materials has been done focusing on finding ways to limit cracking of the glass surface. “A scratched glass is much weaker than pristine glass when it has not been exposed to dust or air,” says Mr. Bingham. A number of new glass materials manufacturing techniques have been invented to make bridges, which is to add a layer of material such as polymer to the outside, preventing the glass from being cracked or scratched. This technique was used to build bridges in Longjing, China as outlined above. Many other glass manufacturers may put thin layers of flexible polymer in between the glass layers in case one glass breaks, leaving another layer intact to prevent total cracking. In general, the British expert affirmed, if the glass bridge is built by the above methods, it is basically safe. The most important thing is to ensure safety in operation, especially in case of bad weather. Around March 2018, according to China state television (CCTV), Hebei province had to close all 32 glass bridges for safety checks. In 2019, a man in Guangxi, China slipped on a glass bridge due to heavy rain, fell off the bridge and died.

Anti-Atlas Mountains, Morocco. The photo was taken by NASA using the ASTER (a high resolution imaging tool, using technology to measure reflected radiation and heat emission) on NASA’s Terra satellite. The mountain range formed about 80 million years ago, when the African continent and Eurasian continent collided. The mountain range includes diverse components, such as limestone, sandstone, plaster and granite, according to CNN. Qinghai Lake, China’s largest lake, viewed from above through NASA’s EarthKAM lens. Qinghai Lake is located on the Tibetan Plateau, stretching over 4,300 square kilometers and about 25.6 meters deep, according to CNN. Paris, France looks strange when taken from NASA’s Terra satellite. The Empty Quarter Desert, Saudi Arabia. NASA’s EarthKAM captured a beautiful intersection between the suburbs of As Sulayyil Sulayel and the Rub ‘al Khali Desert in Saudi Arabia (Empty Quarter). It is considered the largest uninterrupted sand desert in the world. Grand Canyon is America’s most famous national park, stretching about 446 km. Seen from NASA’s Terra satellite, the red rock patterns in the mountain look like a work of art, according to CNN. Patagonia, Chile. NASA has been using ASTER to keep track of shrinking glaciers. This is a warning of global warming problem. China’s Great Wall, spanning more than 2,000 kilometers, is believed to have been built in the 3rd century BC. This ancient fortress is currently one of the most visited heritage sites in the world. Photo: NASA. The Rio Gurupi, Brazil is part of the Gurupi biological reserve. The river flows through a coastal plain, home to a vibrant ecosystem, including dozens of islets, mangroves, sand dunes, lagoons, lagoons and beaches. Photo: NASA. Danube Biosphere Reserve, Ukraine. As the longest river in Europe, the Danube River winds through 19 countries, including Germany, Austria, Hungary and Ukraine. NASA’s Earth Observatory captured the Danube delta, where the river pours into the Black Sea. This area is recognized by the United Nations as a world heritage site, and as a center of biodiversity, with more than 300 species of birds. Grand Bahama Coast. The image is a deep-water area of ​​Tongue of the Occean – an underwater gorge. Photo: NASA. Andes Mountains in South America through NASA EarthKAM lens. Off the Russian island of Sakhalin taken from NASA’s EarthKAM. St Anthony’s Monastery, Egypt, looks like a red spot between the desert and the Red Sea mountains. St Anthony’s Monastery is the oldest Christian monastery in the world. Photo: NASA. Persian Gulf with famous rivers such as Tigris, Euphrates, Shatt al-Arab and Karun. Photo: NASA. Outback region, Australia. Image taken by NASA EarthKam in the area adjacent to the rocky desert of the Outback region with the edge of a lake.