Son Doong Cave in Phong Nha Ke Bang National Park (Quang Binh province) is the largest cave in the world, has the most beautiful stalactites, and the longest underground river in the cave...
Son Doong Cave was first discovered by a local in 1991, but it wasn't until an expedition by the British Cave Research Association in 2009 that it became widely known. Photo: The giant stalagmites in the cave can be up to 40m high.
Marble Cathedral Cave in Patagonia, Chile is considered a perfect creation of nature. This place is also known as the Blue Cathedral, because the natural curve of the marble reminds visitors of the dome architecture of European churches.
The sunlight shining down will create a sparkling reflection effect on the cliffs and blend with the blue water, looking very attractive.
Waitomo Glowworm Caves in the North Island of New Zealand are famous for their countless glowworms that emit magical light.
Batu Caves, Malaysia consists of three large caves and many small caves scattered on a limestone mountain about 400 million years old, about 13km from the city. This is the most sacred place for Hindus in Malaysia.
The Algarve caves were formed by the erosion of rock by the sea. This popular attraction is located on the peaceful, white sand coast of the southernmost tip of Portugal.
Vatnajökull Glacier is the largest glacier cave in Europe. Iceland's cave attracts many explorers, although it is quite dangerous because the glaciers are constantly shifting and breaking up.
Tham Lod is one of the largest ancient caves in Thailand, located in the city of Pang Mapha. This cave has the world's tallest stalactite columns at 62 meters.
The only way for visitors to get into the cave is by boat because the Nam Lang River flows through it. The cave in northern Thailand is home to hundreds of thousands of Pacific swiftlets.
Antelope Canyon in Arizona, USA is also considered one of the most beautiful caves in the world. The tall vertical rocks were carved by nature over thousands of years by the impact of wind and continuous flash floods.
Reed Flute Cave is a famous tourist attraction in Guangxi Province, China. The cave has many stalagmites and stalactites of spectacular and strange colors. Reeds grow abundantly here, which is why the cave is named after them.
Ellison Cave, USA has a deep depth and unique vertical structure that attracts many adventurous tourists. To get into the cave, visitors must lower themselves down by rope or pulley.
Phraya Nakhon is a cave discovered 200 years ago, possessing a mesmerizing beauty with shimmering light streaks in the early morning.
Thailand's famous cave attracts hundreds of thousands of visitors thanks to its ancient temple built in 1890 on the occasion of King Chulalongkorn's visit.
Kyaut Sae Cave, Myanmar is little known, recently renovated into a Buddhist temple.
Mendenhall Glacier is a glacier near Juneau, Alaska. The ice cave has a mysterious beauty with large ice blocks, illuminated by many colors.
The Naica Mine, Mexico, is home to a number of giant crystal formations. Today, exploration is prohibited due to its depth, heat, and other dangers.
Kamchatka Ice Caves, Russia is known not only for its harsh climate but also for its unspoiled natural landscape. It is surrounded by the active volcano Mutnovsky which is active on the surface.
The ice surface shimmers in many colors because the ice layers are relatively thin, creating shimmering effects when the sun's rays shine down.
