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

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

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

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

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

The clock that sets them all.

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

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

This spectacular track has run continuously since 1882.

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

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

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.

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

A technicolor place of worship for Elevationists.

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

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

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.

A roadside attraction filled with an astounding array of gloriously wacky vehicles.

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