The entrance to the Natural Bridge Caverns is a giant sinkhole which is spanned by the caverns’ namesake—a 60-foot (18-meter) limestone bridge. A crawlway descends into .1 wonderland of huge chambers, massive limestone columns, and delicate crystalline formations. The largest chamber, the Hall of the Mountain Kings, is 350 feet (107 meters) long, 100 feet (30 meters) wide, and 98 feet ( X) meters) high. The caverns’ first explorers louiul 5,000-year-old artifacts. They also
stumbled across an 8,000-year-old skeleton of an extinct grizzly bear.
The caverns formed 12 million years ago when rainwater dissolved the limestone substrate. They are full of strange formations created by calcite precipitating out of the dripping water and accumulating into a myriad of shapes. It takes approximately 100 years for one of these formations to grow 1 cubic inch (16 cubic centimeters).
The developed portion of the cave, with a half-mile of trails and 35,000 watts of indirect lighting, takes the visitor 260 feet (79 meters) below ground level. The more adventurous can crawl among cave formations buried 160 feet (49 meters) into the subterranean world.