The former Naval shipyard is open for exploring - mostly.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

A Hawaiian stairway to heaven—that you can't climb.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

Concrete strongholds stand guard over the Golden Gate.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The echoes of a railroad town that solemnly mark the end of the line.

Quite simply the largest tree in the world (by volume).

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

An abandoned cyanide mill is now a haunting magnet for graffiti and illegal parties.

One woman's Viking Castle on Lake Tahoe.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

Dentist's hated concrete colossi are now beloved icons of the community.

The first U.S. town to secede from the Union, only to vote themselves right back in.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

The wild west is still alive and well at this authentic mining town watering hole.

The drama of nature in full effect in this Nevada State Park.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

A land of debatable treasure.

One of the most unusual geological features, recognizable from a dozen hit movies.