This 19th-century ranch is being transformed into a residential library with thousands of books about the natural world.

All that remains of this once-booming mining town are the ruins of a saloon.

A tiny nondenominational church harkens back to the days of the first homesteaders in the region.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

A small store filled with animal skulls and other curiosities.

This nearly abandoned town was once a thriving mining community until a series of fires.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

A lively annual event in which thousands of people race to push coffins heavy with bodies up a hill.

A museum dedicated to the mysterious cryptid.

A coal fire has been burning underground here since 1896.

It's easy to forget what century it is as you wander this rustic homestead.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

Toss a Frisbee through the ruins of this Colorado gold mining town.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

A mental health hospital dating back more than 139 years, now features a museum.

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

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

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

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.

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.