A Winnebago Tribe collection featuring arrowheads, artwork, and a mysterious rock carving.

America's first National Historic Landmark is a 100-foot tall obelisk and gravesite dedicated to the only casualty of the Lewis & Clark Expedition.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

For posterity, a singular achievement: 3,780 hours of dancing.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

This massive roadside mascot was the first version of the giant to illustrate his butt.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

Piled high inside this warehouse and coffee shop are salvaged goods that span every corner of the globe.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.