What is the longest ice cave in the world?

Discover the world's biggest ice cave! Werfen's Eisriesenwelt [world of ice giants] is actually the world's biggest ice cave: The cave system extends more than 42 km deep into the mountain. The first section, about a kilometer in length, features imposing ice formations and is open to the public.



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The cave is inside the Hochkogel mountain in the Tennengebirge section of the Alps. It is the largest ice cave in the world, extending more than 42 km and visited by about 200,000 tourists every year.

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Formed during the ice age 3 million years ago, the Ningwu ice cave stays frozen all year round.

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During the winter they can go down to -10°C (14°F), and even below that. They are made of ice after all! That's why it's really important that you wrap up warm when visiting the caves. If you suffer too much from the cold, you just won't enjoy the experience as much as you could.

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Son Doong is considered to be the largest cave in the world, based on volume and also the biggest cave in Vietnam, found by Ho Khanh – a Phong Nha jungle man in 1990.

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Northernmost and Coldest Caves in the World: Greenland Caves Project (Hazel Barton) | Northern Rocky Mountain Grotto.

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Ice Cave Safety Tips Many tourists might expect Iceland to be a 'great untamed land', and it is in a lot of ways; however, there aren't really any ice caves that can be visited without an experienced guide. The reason for this is that without experience and the right equipment, ice caves can be very dangerous places.

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Once a cave builds up a sizable mass of ice and a large volume of the surrounding bedrock becomes cold, thermal inertia propels frigid temperatures through the heat of summer.

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Can you see ice caves in Iceland in the summer? Iceland's natural glacier ice cave season is in winter, from mid-October until the end of March, except for two glacier caves accessible all year.

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11 Spectacular Ice Caves Around the World (PHOTOS)
  1. Eisriesenwelt, Austria. ...
  2. Mer de Glace Ice Cave, France. ...
  3. Rhone Glacier Ice Caves, Switzerland. ...
  4. Narusawa Ice Cave, Japan. ...
  5. Mendenhall Glacier Ice Caves, Alaska. ...
  6. Los Glaciares National Park, Argentina. ...
  7. Dobsinska Ice Cave, Slovakia. ...
  8. Big Four Ice Caves, Washington.


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#1: United States Caves (45,000) Stretching from sea to shining sea, the United States harbors an estimated 45,000+ caves, the product of millions of years of geology at work. The country's varying terrains — limestone-rich regions, rugged mountains, and desert areas — offer a diverse array of caves.

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Slovenia is a world-famous caving destination, with around 8,000 jamas, or caves, located in a country smaller than Vermont.

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The entrance to Cathedral Caverns in Grant, Alabama, USA, is the largest cave opening in the world. Measuring 38.4 m (126 ft) wide and 7.6 m (25 ft) high, Cathedral Caverns, which is approximately 1,220 m (4,000 ft) long, was originally known as the Bat Cave until it was developed into a tourist attraction after 1955.

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