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.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

This iconic science fiction house still looks like something from the future.

This interpretive path lets you get up close and personal with dinosaur bones.

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

A recreation of an Old West apothecary full of curios.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

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

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

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

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

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.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

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

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

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

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

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

This spectacular track has run continuously since 1882.