[zimmy/Natl. Cave Assoc]"Indian Burial Cave was originally known as Big Mouth Cave. In 1959, James F. Atkisson discovered artifacts and several Indian burials within the shelter-like mouth of the cave. Soon thereafter, the Atkisson family opened it to the public, not so much for the cave portion but for the artifacts, which they displayed.
A few years later it was leased to Lee Mace and Al Lechner of Lake Ozark. The new operators installed an inclined cable car, built a gift shop at the parking lot, dug out enough fill within the cave beyond the Indian burial area to create a lake, installed a pump to recycle water, housed in the opening, installed a few dim lights and a pontoon boat, and enlarged upon the Indian burial and artifact exhibits.
The cave was open to the public until the death of owner Lee Mace about 10 years ago and has since been closed. It is no longer promoted in the area. It is essentially an abandoned show cave operation."
And this too....
"No story about Ozarks classics is complete without a mention of Indian Burial Cave, about two miles south of Bagnell Dam. Opened to the public in 1960, it featured Native American artifacts and skeletal remains displayed behind chicken wire. Although the cave has been closed since 1987, Lake visitors remember thousands (so it seemed) of unique road signs that popped up every mile or two on all the major highways in the region, advertising the cave. The legs of the sign were designed to resemble two large arrows pointing downward with the billboard itself suspended between them. "