The remains of the dam that unleashed a 15-foot wall of water on Denver.

When ecosystems collide in the arid Southwest.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

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

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

A multi-storied adobe complex has been inhabited for more than a thousand years.

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

Even in death, he's still your huckleberry.

The largest self-built castle in the U.S., six decades in the making.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The highest bridge in America was built for an almost unnervingly small amount of money.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

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

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

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

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

Explore some of the most unique vehicles in history along with a cast of unsettling mannequins.

A downtown park built on top of unclaimed graves.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.