Strange red rock formations that have been attributed to a higher power for hundreds of years.

This naturally-sourced hot spring is now home to a clothing-optional resort.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A technicolor place of worship for Elevationists.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A surprisingly beautiful abandoned World War II military base in East Greenland.

World War II-era Nazi compound nestled in the Santa Monica hills.

One of the ghostly stops along Route 66.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

The ghost town that ended up on Ebay.

An expansive book store, art gallery, and curio shop with wares ranging from tarot cards to novelty socks.

The largest drain hole in the world.

One of the last free public hot springs is decorated with hippie art.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Abandoned bridge hidden deep in the San Gabriel Mountains.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

The site of murders and Satanic cult gatherings.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.