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.

An important Mayan religious and trading center dating back to 200 BC.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This tiny home was originally a narrow alleyway.

The highway's southernmost spot is a beloved local attraction.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

The island residents are known for taking their quirky sense of humor with them to the grave.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

This maze-like, oceanfront gift shop—the nation’s largest— has been serving kitsch to the Myrtle Beach community for over 80 years.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Yo, Adrian!

World's first "penitentiary," meant to be humane, drove men insane.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

This elaborate towering structure was once famed for its revolutionary height.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Decades before the scandal, this staircase on the river was a literal "water gate."

Washington's iconic carousel has a nice piece of Civil Rights history.

An overlooked memorial honoring the local Washington residents who died in World War I.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

Look closely and you’ll notice that the color changes a third of the way up the tower.