Shenandoah Caverns

Shenandoah Caverns is a commercial show cave located near Mount Jackson, Virginia, in the Shenandoah Valley and it is the only cavern in Virginia that has elevator access.

The Shenandoah Caverns has a mile-long guided tour, and its temperature naturally remains at 54 degrees year-round. Seventeen "rooms" of connecting chambers are traveled through during this time. Geological formations have been named: the Diamond Cascade, the Grotto of the Gods, the Rainbow Lake, the Oriental Tea Garden, and the Capitol Dome, and these are lighted for display. The "bacon" formations were featured in a 1964 issue of National Geographic Magazine.

Source: Wikipedia