A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Most-visited and most-photographed slot canyon in the American Southwest.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

On the Oregon coast there is a natural hole that seems to be draining the sea.