The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This quirky piece of naval artillery has been deafening Canadians for over a century.

What appears to be an act of fruit vandalism is actually a cultural statement.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Death rituals and sacrifice inside a Peruvian megalith.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

A mysterious spot where the laws of gravity seem not to apply.

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

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

The "lovely red Vega" of the legendary record-settling pilot.