Ape Cave

(from the article `cave`) ...the United States lava caves are found chiefly in the Pacific Northwest—northern California, Washington, Oregon, and Idaho—and in Hawaii. One of ...
Found on http://www.britannica.com/eb/a-z/a/87

Ape Cave

Ape Cave is a lava tube located in Gifford Pinchot National Forest just to the south of Mount St. Helens in Washington state. Its passageway is the longest continuous lava tube in the continental United States and the third longest (in total mapped length) lava tube in the North America at 2.5 miles (4,023 meters). Ape Cave is a popular hiking des...
Found on http://en.wikipedia.org/wiki/Ape_Cave
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