A marble cornerstone marks the location of what could have been a presidential palace.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

A popular European tradition makes its way to the states on one of America's most famous bridges.

World Trade Center memorial likened to a woman's sexual organ.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

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

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

An extraordinary collection of aircraft and spacecraft on display at the original site of the Boeing Company.

This former coal gasification plant found a curious second life as a popular public park.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

Fill up your senses in this beautiful riverside garden, dedicated to the works of singer-songwriter John Denver.

Abandoned silver mine strewn with wrecked and twisted structures.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

The magic's in the hole!

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

You can stand in three U.S. states at once.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

The fifth-longest natural arch in the world, and the longest outside China.

It takes a nine-mile hike to reach these hot springs, but weary hikers are rewarded with stunning views and a warm soak.

Roaming bison and a spectacular view at the highest point in Nebraska.

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

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.

In a small Japanese garden off a busy Denver street, a memorial to a brave, principled politician.