This Boeing KC-97 tanker is now a restaurant for aviation lovers.

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.

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

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

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

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

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

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

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

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

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

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

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

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

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.

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

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

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

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

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

This super steep hike ascends 2,000 feet in less than a mile.

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

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