A downtown park built on top of unclaimed graves.

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

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

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

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

See six states, pickled freaks, rocks, and antiques.

The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

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

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

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.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

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.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

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

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

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

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

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

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

A technicolor place of worship for Elevationists.

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