This 18th-century project to build the world's tallest gravity dam was never completed.

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

Once luxurious, these oceanfront beach homes have been left to succumb to the elements as the beach is slowly washed away.

Built to hold Gold Rush wealth, this building has withstood the test of time.

On October 26, 1963, a 12-kiloton nuclear device was detonated here in granite some 1,211 feet below the ground surface.

A spectacular but little-known slot canyon in extreme northern Nevada, with sheer walls nearly 500 feet high and a perennial stream.

The headquarters of the Audubon Naturalist Society is a small slice of heaven for nature lovers.

This small town was built around a marble quarry and named after one of the most famous sources of marble in the world.

A hidden slot canyon in the southern Nevada desert makes an unexpected oasis and scenic hike.

A striking memorial to the 21 lives lost in an explosion at the Washington Arsenal

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

The secret city built by the Manhattan Project.

An emporium for the weird, creepy, rare, and just plain gross.

The site of the climactic scene from the classic horror film is now a historic landmark.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The first declared National Monument in the United States.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Eighteen miniature death-scene dioramas.

This shop for all your super spy needs hides an educational secret.

A museum dedicated to the history and exploration of both popular music and science fiction.