Meramec Caverns

Meramec Caverns is a 26 mile cavern system in the Ozarks of Missouri, USA. It was formed from large limestone deposits over millions of years. Pre-Columbian Native American artifacts have been found in the caverns. The bandit Jesse James once used the caverns as a hideout. Currently the caverns are a tourist attraction, the billboard of which can be found the length of Interstate 44.