Longxidong
Namibia
Source: Namibia Immigration Bureau.
Namibian kalahari desert is also known as the "dry lake" at the end of a very short river. Although several water systems flow through here, no water flows into the ocean from here. Streams pour into depressions in the desert and disappear without a trace after infiltration and evaporation. Under this arid and barren kalahari desert, there is a huge natural "reservoir". 1986, an expedition discovered this place. When standing at the mouth of the cave, a moist breeze blew out from the inside, which is the origin of the name "Dragon Rest Cave". The lake is bottomless, and the exact depth is unknown. It is said that it is at least 100 meter. Longxi Cave is the largest underground lake in the world, but such a huge cave is only a part of the underground cave system in kalahari desert, which is a miracle of the world.
Source: ins_leonardopassos
The lost ocean
United States of America
Source: ins_smokymountains
The Lost Ocean is located in Craighead Cave, Tennessee. It is the second largest underground lake in the world and the largest underground lake in the United States. The mouth of the cave is narrow and the passage is tortuous, but as soon as you enter the hole, the scene in front of you suddenly becomes clear. There are several spacious spaces in the cave that can accommodate hundreds of people. According to legend, this is the place where Indian tribes used to meet and have dinner. In addition to a large number of stalactites, there is also a kind of rock called "Shihua" growing in the cave, which is different from the vertically growing stalactites. Stone flowers are radially crystallized and accumulate over time, forming crystal-clear "flowers" in the stone. Walking along the road of stone flower growth to the depths of the cave, a clear and quiet underground lake is displayed in front of tourists. Next to the trestle bridge, you can take a glass-bottomed boat and have an "geocentric adventure". Boating on the lake, the sound of flowing water came from time to time in the quiet cave, and a large group of trout occasionally appeared, adding a bit of mystery to this water area.
Source: ins_karibealtv
California cave
United States of America
Source: ins_visitgoldcountry
California Cave is the first cave open to the public in California, hidden in the foothills of Nevada, California. Since its opening in 1950s, it has attracted countless explorers and tourists, including Hart Brothers, Mark Twain and john muir. Moore described his trip in his book "California Mountains" published in 1894. When you walk through a long and narrow tunnel, you can often see low-lying puddles embedded in the surface like gems. The clear underground lake is more mysterious against the surrounding stalactites and stalagmites. Do you want to swim 25 meters underground? The cave underground lake in California is open to tourists. Visitors can not only jump into the lake to swim, but also swim in kayaks.
Source: ins_nk_aroundtheworld
Ludidong
China Guilin
Source: ins_unik_soul
I have seen many strange caves abroad. In fact, South China is also rich in cave resources. Reed flute cave, located in the mountains and rivers of Guilin, Guangxi, is a representative of typical karst landform. Outside the cave are lush reeds, which locals often use to make flutes. The melodious sound of the long flute echoed among the mountains and rivers in Guilin, forming beautiful music with the sound of nature, hence the name of reed flute cave. The whole cave is magnificent. Under the colorful lights, this cave is like an underground palace made of gems and glass. Stalagmites, stalagmites, stone flowers, stone pillars ... the wonders of nature are obvious here. According to legend, 6,543,800 years ago, this was an underground lake. With the crustal movement and mountain uplift, the once magnificent underground lake has become a "fairyland" of stone carving, full of traces of years and natural changes.
Source: ins_terrax
Rift hot spring
Iceland
Source: ins_farinorth
Iceland is located near the Arctic Circle. It is cold all year round, but it is rich in geothermal resources. It is the country with the most hot springs in the world, so it is called "the country of ice and fire". There is a melting cave near Lake Mi in Iceland, which is famous for its geothermal hot springs. The film and television drama Fire and Ice: Game of Thrones, which is popular all over the world, was shot here. Climb into the frozen and cold cave, and you will see a quiet and clear hot spring embedded in the depths of the cave. With the moist and warm steam rising, the originally cold cave becomes warm and comfortable. Icelanders like to soak in water very much. The custom of soaking in hot springs in caves can be traced back to18th century. Rift Valley Hot Springs is also one of the hot springs frequented by local people in the past. However, it was not until the 1970s that the active crustal movement made the water temperature here rise above 50 degrees Celsius, which was no longer suitable for people to soak in hot springs here, and this hot spring was forced to close.
Source: ins_inviaggiocoltubo
Hansongdong
Viet Nam
Source: ins_eathn
Han Song Cave is considered as the largest natural cave and the deepest cave passage in the world. The length and width of several spaces in the cave can reach about 80 meters and the depth is far more than 4.5 kilometers. It is like an "underground lost city" hidden in the primitive jungle. There are several underground rivers and jungles in the cave. After a long period of polishing and water erosion, the cave has formed a complete ecosystem. Towering stalactites, ancient biological fossils, rare animal species and so on were born here in harmony. Sunlight poured down through the skylight of the giant cave and shone on the huge lake, making the calm lake water like a green emerald, reflecting the uneven rocks and green grass moss in the cave. Standing here is like entering another world and opening an exciting and novel geocentric adventure.
Source: ins_susannekarinmoe
Ovi i.
Britain, England
Source: British Immigration Service.
"Owey" means cave in Irish, and it is a paradise for cave lovers, kayakers and rock climbers. Clear blue sky, crystal green sea water, a little pink granite, rough waves ... all the scenery here makes it hard to imagine that there is a hole on this island. Underground lakes are not uncommon, but have you ever seen underwater lakes? Climb 50 meters down the narrow stone crevice channel from the tiankeng above the island, and you will see a completely different Ouwei Island. Under the rough sea, there is an underground lake, which flows quietly in the cave. If you are a kayaker, you can row into the deepest part of the cave along the current. The narrow current turned into a wide lake. The calm water is surrounded by towering granite, just like a huge conch, echoing the roar of the waves beating the rocks outside.
Source: ins_sineads
Saint Leonard L.
Switzerland
Source: Lake Saint Leonard, official website.
Lake Saint Leonard, located in Valais, Switzerland, is the largest underground lake in Europe. The height of the cave is about 10 meter, and there are all kinds of strange stones. Visitors can take a boat through the cave and experience an extraordinary underground cruise. During the 30-minute voyage, visitors can immerse themselves in a strange geological exhibition. Gypsum crystals, which have been formed for hundreds of years, shine brightly under the mottled light, which is in harmony with the clear lake water. This fantastic trip will inevitably be too short. You can also make an appointment for customized activities, such as tasting the special private cuisine of Valais on a cruise ship, or attending a concert in the cave to feel the unique cave acoustic effect.
Criz Na Cave
Slovenia
Source: Slovenian Immigration Service.
Water is of great symbolic significance to Slovenia. Whether it is Lake Bled around the castle, the sparkling Socha River, the unpredictable intermittent lake or the underground lake that created the cave world, it has shaped a variety of water worlds and made Slovenia enjoy the reputation of "the country of water". Criz Na Cave is one of the most famous caves in Slovenia, which is famous for its huge and rich underground lake system. Large and small rivers and lakes are intertwined in the cave, so visitors can take a boat in the green and clear water and enjoy the strange stones with different postures and rich and rare animals in the cave.
Covatta L.
Turkmenistan
Source: ins_bryan.gets
Want to know what it's like to swim 80 meters underground? Turkmenistan has such a natural swimming pool, which is located in a cave not far from Ashgabat. The winding metal stairs and the blue and clear underground lake stand in front of tourists. Towering rocks stand around the lake and become a "screen" for tourists to play with water here. Lake Foata is rich in minerals, and the temperature keeps around 35 degrees Celsius all the year round, attracting many tourists to experience it. Swimming in the lake can beautify and tighten the skin at the same time, which is a good place for fitness and entertainment.
Liu Yilin Global Travel Weekly