The Most Amazing Caves

The Marble Caves labyrinth sits in Aisen, Chile. Clear Rio Tranquilo waters shaped the giant limestone peninsula into these caves.

See the Glowworm caves in New Zealand. Worms the size of mosquitoes create a romantic sight.

Before the 1970s, this was the case.Mineral-rich waters flooded the Naica mine, now the "Cave of Crystals." These waters helped form some of the world's largest crystals. Miners found the cave's interior in 2000 during mine prep.

Missouri is called the "cave state." Centuries of underground rivers and springs formed its huge cave network. Visit Onodaga Cave State Park to see towering stalagmites, stalactites, and flowstones.

Heat and ice combine around the Mutnovsky Volcano in Russia to form amazing natural formations in caves like these.

Son Doong Cave is the world's largest cave. A local man discovered it in 1991 in Quang Binh province, Vietnam.Quang Binh province means [name meaning].It is a mountain river cave.

Carlsbad Caverns features "The Big Room," one of its most incredible parts. This chamber stands almost 4,000 feet high. The Big Room ranks as the third largest chamber in North America and the seventh largest on Earth.

Check out the Blue Grotto for blue beauty. It sits on the eastern end of the Bisevo islet. Sunlight blasts through an opening at the grotto's top. This light reflects off the cave floor, making a silver-blue shine.

The Reed Flute Cave gets its name from reeds that make flutes. This spectacular cave formed from underground karst limestone over millions of years. Multi-colored lighting now highlights this surreal site, which Guilin tourists have seen for over 1200 years.

The Phraya Nakhon Cave's collapsed roof provides stunning light. Royalty visited this cave for centuries; the central pavilion was built for King Chulalongkorn's visit in 1890.King Chulalongkorn visited in 1890.

The Devetashka cave sits near Devetaki village. It is one of Bulgaria's largest caves. Archaeologists confirmed the cave held inhabitants before 1921.The cave was inhabited during the late Paleolithic era, Neolithic, Bronze, Iron, and Middle Ages.

Locals found the Choranche Cave around 1870 while seeking water during a drought. Thin, delicate stalactites, called soda straws, make for a beautiful underground adventure.

Legend says the Kyaut Sae Cave appeared in the thirteenth century. It became a local hideout from Mongol persecution. Today, local monks still visit the gorgeous Buddhist temple inside.

Postojna is one of the world's best-known caves. It holds the only cave with its own railroad. Over 36 million people visited it in 200 years. This makes it Slovenia's biggest tourist spot and one of the world's largest karst caves.

Skocjan Caves look like the Grand Canyon and Great Barrier Reef. They are listed among the world's natural wonders. People added them to the list in 1986.UNESCO added the Skocjan Caves to its list of natural and cultural world heritage sites.

Explorers recently found "Cave of the Ghost," one of the newest caves on the list.Explorers found "Cueva del Fantasma" or "Cave of the Ghost" less than ten years ago. The cave fits two helicopters for landing near its large waterfall. Scientists also found a new frog inside.

Underground hot springs formed this ice cave as water flowed toward the sea. The marbled cave effect looks stunning. However, entering these ice caves is dangerous; cave-ins are always a risk.

Locals named Deer Cave because deer used it as shelter to lick its limestone. The cave itself is beautiful. It also opens to a sinkhole called the "garden of Eden."

Fingals Cave, the only sea cave made of hexagonally jointed basalt, looks like something from Lord of the Rings.Fingals Cave looks like something from Lord of the Rings.The cave’s cathedral-like shape inspires awe. Its size and arched roof create strong acoustics. Waves echo eerie sounds through the chambers.

Ornate Hindu temples inside the Batu caves enhance the natural beauty. Hundreds of wild monkeys near the entrance lure visitors in.

Kelly Hill Conservation Park caves let visitors choose adventure caving with hard hats or relaxing on trails near the entrance.

The Cave of Swallows is one of the world's largest shafts. It is so deep it could hide the entire NYC.The Chrysler Building gets its name from swallow birds. They live inside and fall down the cave with their wings tucked until they reach their nests to glide the rest of the way.

Miners found the Damlatas Cave in Turkey in the 1940s. Now, people know it for the air quality. That air helps asthma patients. Scientists found this because the cave air holds 10 to 12 times the carbon dioxide of normal air, plus 95% humidity.

This massive underground cave system is a popular Caribbean spot. Visitors love the stunning caverns, the breathtaking formations, and the underground waterfalls and streams. A tram tour offers a relaxing adventure through the cave.

Want to go to the Earth's center? Visit Gouffre Berger Cave in France. Adventurers once feared this killer cave. At 3,680 feet deep, it was the first cave explored past 1,000 meters under the Earth. Joseph Berger, the Frenchman, named it after himself.

Tham Lod Cave shows prehistoric coffins. Every evening, 300,000 swifts return to their nests inside. Visitors explore the caverns with lamplight or hire local guides for bamboo raft tours.

About 11 miles north of Beirut, you will find the Middle East's longest cave. It is a major tourist spot. The Grotto consists of two linked limestone caves. The upper section holds the world's largest stalactite. The lower section contains an underground river, letting you travel through by boat.