A river runs through this remote valley in a very unexpected way.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

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

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

Final resting place of a 19th century gold prospector and convicted cannibal.

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

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

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

Possibly the world's only drive-in movie theater with an attached motel.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

A recreation of an Old West apothecary full of curios.

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

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

An annual festival celebrating Colorado's most famous frozen corpse.

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.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

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

The largest source of fossilized insects anywhere.

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

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

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