Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

A local prank turned town icon.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.