The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

Historic, 19th-century wagon wheel ruts cut into soft volcanic ash.

This marker identifies the location where three states converge.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

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

The remains of a World War II-era Japanese American internment camp dot a windswept Colorado hill.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

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.

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

The remains of an early 1900s dude ranch that operated until the 1970s.

A museum dedicated to the mysterious cryptid.

A hotel with a rich Wild West history of miners and bootleggers.

A coal fire has been burning underground here since 1896.

Two creeks flow out of either end of this canyon in opposite directions.

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

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

One man's love for East Coast diner culture brought an entire eatery all the way from New Jersey to Colorado.

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

Toss a Frisbee through the ruins of this Colorado gold mining town.

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

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

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

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