Located near Mount St. Helens, this cave is full of weird rock formations, from stalactites and stalagmites to columns, flowstone and frostwork.
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Located near Mount St. Helens, this cave is full of weird rock formations, from stalactites and stalagmites to columns, flowstone and frostwork.
Formed about 2,000 years ago from a volcanic eruption, this is one of the longest lava tubes (12,810 feet) in the world.