One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

A scenic ravine with an astounding collection of rock art created by the Indigenous people of the Great Plains.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

Curios, scientific antiques, oddities for sale.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

This Colorado fire station has been in continuous operation for more than a century.

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

Take a dip in the world's largest mineral hot springs pool.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

It takes a nine-mile hike to reach these hot springs, but weary hikers are rewarded with stunning views and a warm soak.

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.

This nearly abandoned town was once a thriving mining community until a series of fires.

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

A museum dedicated to the mysterious cryptid.

The world's largest sticker ball weighs in at a mighty 231 pounds.

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

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

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

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Community owned and operated, this property is home to a diverse set of nudists.