On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

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

A long and winding trail through history led to the current iteration of this mountaintop tower.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

Above Breckenridge, a destructive mining technique sits sunken in a small pond.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

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

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

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

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

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

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

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

A tiny nondenominational church harkens back to the days of the first homesteaders in the region.

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

This marker identifies the location where three states converge.

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

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

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

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.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

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

According to local legend, a tree grew from the stake that killed this alleged vampire. In reality, he probably died from influenza.

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