A downtown park built on top of unclaimed graves.

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

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

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

This Colorado fire station has been in continuous operation for more than a century.

When ecosystems collide in the arid Southwest.

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

A giant donut stands as a popular symbol of Los Angeles iconography.

A "haunted" landmark on the coast of Southern California.

This symbol of peace is appropriately positioned overlooking the Pacific Ocean.

A historic fort commemorating the United States' naval history.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

The Route 66 institution that inspired Taco Bell also served as an important headquarters for Mexican-American social movements.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

A multiversal transit station located right below a highway interchange.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.

The world-record holder for the longest bridge stretching continuously over water.

With its vaulted ceiling and gilded details, this University of Washington library would feel right at home inside an old palace.

A wall of chewing gum moonlights as collective art.

The highest point in Washington state is a volcano covered in glaciers.