This memorial to a horrific ship collision sits over a mass grave holding dozens of the victims.

An enchanting tunnel of cypress trees leads to an old morse code station still used today.

Napa's oldest building is now a Mexican restaurant.

Abandoned landscape once home to "the world's largest winery."

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

An abandoned Cold War missile radar site.

A sparse, solitary sequoia still stands as a living tribute to the famous conservationist who planted it—but it's dying.

A hotel with a rich Wild West history of miners and bootleggers.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The remnants of a 1970 plane crash remain high in the Rocky Mountains.

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

A museum dedicated to the mysterious cryptid.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

A memorial dedicated to the victims of the Columbine High School shootings.

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

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

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

Toss a Frisbee through the ruins of this Colorado gold mining town.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

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

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