The site is in the Siskiyou Mountains, 20 miles east of Cave Junction on State Road 46. Its access road winds through the dense forests that are SW Oregon's trademark. Trailers are discouraged.
In the marble heart of Mount Elijah at the 4000-foot level, nature has carved and decorated the Marble Halls of Oregon. Pillars, stalactites and canoies of calcite line passageways and hang from the vaulted domes of the cavern's many galleries.
Tours are offered at intervals or as groups of 16 people form. Children under 6 must be at least 42 inches and pass a stair test.