When ecosystems collide in the arid Southwest.

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.

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

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

There are eight natural springs around town, each with a slightly different taste.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

Explore some of the most unique vehicles in history along with a cast of unsettling mannequins.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A downtown park built on top of unclaimed graves.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

Train cars and railroad artifacts abound at this restaurant devoted to railway history.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The remains of a historic ranch house that witnessed the Civil War battle dubbed the “Gettysburg of the West.”

Home to items never before seen by the public.

The most decorated dog of World War I is preserved in the Smithsonian.

The trials and tribulations of marking Poe's grave.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.