This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

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

The largest source of fossilized insects anywhere.

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

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

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

Colorado's only true geyser is hidden within the San Juan National Forest.

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 of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

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

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

Abandoned silver mine strewn with wrecked and twisted structures.

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

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

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

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

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

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

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

A technicolor place of worship for Elevationists.

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

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

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