While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

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

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

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

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

When ecosystems collide in the arid Southwest.

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

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

The largest self-built castle in the U.S., six decades in the making.

A technicolor place of worship for Elevationists.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

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

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

A collection of over 15,000 zines works to preserve DIY publishing culture.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

Abandoned silver mine strewn with wrecked and twisted structures.

The remains of the dam that unleashed a 15-foot wall of water on Denver.