A fake mine that was made using real mining techniques which is also used as a community center.

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

Unlike most arches, this geological oddity formed in a volcanic dike.

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

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

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

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.

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

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

Even in death, he's still your huckleberry.

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

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

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

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.

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

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

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

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Thousands of mounted insects, and some live ones, hide within an otherwise ordinary shopping mall.

The vanishing remains of an old water station from the late 19th century.

The final resting place of the most famous outlaw in the Old West.

A frozen oasis lies beneath the scorching New Mexico desert.