This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

This geodesic gallery holds a collection of painted spheres that make traditional canvases look lazy by comparison.

A cemetery housing wild west legends in South Dakota.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

Just a man taking his prehistoric pet for a stroll.

All that remains of this Massachusetts town, demolished in the name of progress, is a stone marker.

A recreated sign from the movie Jumanji has become a makeshift tribute to the film's late star.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

One street divides a single town that stands in two U.S. states.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

With nickel-steel armor and three-inch thick bullet resistant windows, FDR's train was a rolling fortress.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

The largest tidal whirlpool in the Western Hemisphere.

Built for television, this statue now serves as an unlikely memorial to a fireman who died on 9/11.

This candy-striped tower is the farthest east you can go in the United States.

A roadside park in eastern Maine first marked the halfway point between the equator and North Pole with a brass pin in 1896.