This Rocky Mountain mansion was the luxurious home of the authoritarian leader of a company town.

The first railway tunnel to cross the Continental Divide and, at 11,523 feet, was once the highest railroad tunnel in the world.

This shrine is an ode to the region's rich Hispanic heritage.

Colorado's only active volcano last erupted around 4,000 years ago.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

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

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

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

This alpine statue of Jesus in Silverton is said to protect both miners and local economies.

A whimsical roadside community of little metal people.

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

A monument at the site of the Towner School Bus Tragedy, which lead to changes in school bus safety.

Once named the “world’s oldest gas station” due to its unusual construction material.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

The winter home of thousands of beautiful snow geese and sandhill cranes.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

The 7,000-foot finish line of America’s first Olympic Trials marathon.

In the 1950s, two women saved this grand theater in the Colorado mountains from demolition.

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

This enigmatic building features numerous architectural styles.

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

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

A renovated hotel is bringing new life to a nearly-abandoned mining town in Colorado.