This enigmatic building features numerous architectural styles.

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

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

A prehistoric rock shelter that's literally in someone's backyard.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

Final resting place of a 19th century gold prospector and convicted cannibal.

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

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

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

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

Colorado's only true geyser is hidden within the San Juan National Forest.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

This marker identifies the location where three states converge.

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

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

Neal Cassady may still have an open tab at one of Denver's oldest watering holes.

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

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

This museum remembers an apocalyptic cult that became more famous for baseball than religious radicalism.

This feline raises a friendly paw at drivers barreling toward the freeway.

This sprawling bookstore spans four floors and has more than a million books in stock.

A museum dedicated to the dead and the tools used to usher them into the afterlife.