One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

One of three remaining theatres in the United States created in the Art Deco Mayan Revival style.

An outdoor display of military missiles developed at Point Mugu Naval Base.

Two historic and closed cemeteries, separated by a low income apartment building.

This road earned its macabre nickname after hundreds of Iraqi troops died along it in 1991.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

The unusual burial monument of Arizona's first governor.

Home of the only civilian casualty at the Battle of Gettysburg.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

One man's love for East Coast diner culture brought an entire eatery all the way from New Jersey to Colorado.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

At 207 feet, one of the world's longest continuous escalators.