The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

This outsider art paradise is filled with dinosaur sculptures crafted from recycled machinery.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

A house carved into a rock in the 1940s.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.

Victorian "Fancy Craft" Hair Wreaths and Relics.

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

There are eight natural springs around town, each with a slightly different taste.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

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.

This spectacular track has run continuously since 1882.

The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

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

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."