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

This stone marker honors the man who released Canada goose goslings in Fort Collins, Colorado.

This sidewalk tribute honors Colorado's great culinary creation.

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

A roadside attraction filled with an astounding array of gloriously wacky vehicles.

It's easy to forget what century it is as you wander this rustic homestead.

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

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

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

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

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

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

This spectacular track has run continuously since 1882.

A mural of the Virgin of Guadalupe painted on the rock wall by canyon's religious namesake.

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

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

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

A unique arch graces the Dolores River Canyon near the Hanging Flume.

An ADA-accessible trail and deck offering stunning views of Colorado’s Mount of the Holy Cross.

A remote sandstone plateau named for a legendary cattle rustler.

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

A coal fire has been burning underground here since 1896.

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

The remnants of the base where US Army troops learned how to fight in extreme conditions.