The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This dilapidated ship carcass covered in trees is a striking sight.

An obscure waterfall that looks like something out of a fantasy novel.

A colorful architectural gem in Seattle's uniquely modern Central Library.

Is this the most Portland place ever?

Massive crater in central Oregon.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

Treehouse motel and treehouse-building school.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

Community owned and operated, this property is home to a diverse set of nudists.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

A little-known hot spring haven right below the highway.

The world's largest dead polar bear, immortalized by taxidermy and Hunter S. Thompson.

The most magnificent bottle house in a town strangely full of them.

The farthest you can be in the contiguous U.S. from a McDonald's location.

Water of undetermined depth has attracted rare fish and cult leaders alike.

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

A new kind of theme park for adults off the Las Vegas Strip.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

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