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

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

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

This interpretive path lets you get up close and personal with dinosaur bones.

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

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

Unlike most arches, this geological oddity formed in a volcanic dike.

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

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

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

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

This eclectic collection documents the wild legacies of "America's Wickedest Street."

16,500-acre ranch filled with American heritage, geological wonders, and a giant pile of tires is the crown jewel of an intriguing tug-of-war.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

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

This Chinese-style quartz sundial was saved in its final hour.

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

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

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

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

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

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

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.