A roadside attraction filled with an astounding array of gloriously wacky vehicles.

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

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

While comics are the main attraction at this megastore, the second floor plays host to an exhibit fit for a museum.

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

Travel through the wholesome amusements of yesteryear at this charming miniature village.

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

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

The largest source of fossilized insects anywhere.

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."

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

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

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Though illegal, city officials have made an exception for this work of art.

The graffitied ruins stand hidden within the Pennsylvania woods.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

Limestone caves with spectacular showcase chambers.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

A bigger-than-life pun that has become a beacon of altruism.

A cave's rare beauty held a cavernous secret hidden underground.