At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

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

A downtown park built on top of unclaimed graves.

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

The only nuclear weapon assembly and disassembly plant in the U.S.

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

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

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

The site of a minor battle might have been forgotten if not for one participant’s famous family and the death of a respected warrior.

In a dry, neglected cemetery lies the unassuming grave of a soldier vilified in life but celebrated in death.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

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

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

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

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

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

This massive home was constructed by one of the greatest conservationists in Colorado history.