Moaning Cavern

Cave with vertical entrance shaft. Here have fallen and died prehistoric people and extinct animals. Water drops created a moaning sound that was heard outside the cave. This effect was lost when the cave opening was expanded for tourists.

Lilburn Cave

The longest known cave in California, 34.6 km long. Unusual feature is wonderful marble walls with white and black stripes as well as finds of 30 diverse minerals.

Crystal Cave in California

This 4.7 km long cave is opened to tourists. It has formed in marble and has beautiful cave formations that have been well preserved.

Black Chasm Cave

This cave is 956 m long and has unusual formations of helictites – horizontally growing speleothems.

Bigfoot Cave

An enormous cave, 20 km long and up to 367 m deep. This cave is very challenging to its explorers.

Mendenhall Glacier Ice Caves

Beautiful ice caves in the deep blue Mendenhall Glacier. Caves are formed by streams leaving the glacier. As the glacier is dynamic and, mostly receding due to global warming, the caves also are constantly changing and every year could be in different locations.

Viva Silva Cave

The deepest known cave in Alaska, 242.9 m deep.

Qagnax Cave

A lava tube where have been found remnants of unique dwarf mammoths (Mammuthus primigenius) who lived here around 3700 BC. Cave – 12 m deep pit – was discovered in 1999. Only in Wrangel Island mammoths lived more recently (2590 BC), as far as it is known.

El Capitan Pit

Deepest vertical shaft in the mainland USA, 182.4 m deep. It is near El Capitan Cave but the connection has not been found yet. Discovered in 1989.

El Capitan Cave

The longest cave in Alaska – 3,846 m long and up to 130.8 m deep.