A recreation of an Old West apothecary full of curios.

The clock that sets them all.

This museum offers an actual time machine back through Colorado's past.

A downtown park built on top of unclaimed graves.

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The largest source of fossilized insects anywhere.

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

A prehistoric rock shelter that's literally in someone's backyard.

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