Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

World's largest collection of serial killer artwork and other macabre exhibits.

A psychedelic labyrinth on the San Francisco bay.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

A natural history wunderkammer in the middle of the desert.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

A Tucson museum and performance space full of found-object movable sculptures.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

An urban laboratory.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

Collection of vintage trailers double as hotel rooms.

What is the Thing?

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

A spiritual vortex among the red rocks in Sedona.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

The fading, forgotten remains of a once bright and booming factory.