This abandoned boat sits on a nude beach, is shaped like a UFO, and is covered in graffiti.

Treehouse motel and treehouse-building school.

This charmingly homemade amusement park has been growing for 40 years.

This frequently-photographed waterfall takes only a short hike to visit.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

Hollowed out cedar log tubs set in an ancient towering forest.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

This collection of neon icons is preserving Arizona's history, one sign at a time.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.

A Wild West jailhouse that slid down the mountainside.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

An artificial crater field that trained astronauts for lunar exploration.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The Magical World of George Phar Legler.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

One of the most horrible legacies of the Cold War is a site where the Soviet Union tested nuclear bombs on civilians.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

A Nevada mining boomtown that ran out of silver and luck.