Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Swim or sail to this pie-slinging boat off the coast of St. Thomas.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

These markers are used to document elevation changes around the famed dam.

Don't blink or you'll miss it.

A tribute to the statues of Easter Island along Route 66.

Walk down an otherwise nondescript alley near Washington Square West in South Philly and find yourself in a vivid, immersive mosaic wonderland.

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

The first American department store, and home to the largest operating musical instrument in the world.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Trace the history of the nation’s early days at the site of America’s oldest stock exchange.

This beloved marketplace mascot poops money and grants good luck.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

The final resting place of Christopher Columbus - or possibly someone else.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

One of the most accessible undersea plane wrecks in the world.

In paradise, feral pigs have claimed an island all to themselves.

These two giant boulders mysteriously perched on a 60-foot cliff may have been slung up there by a raging tsunami.

This isthmus in the Bahamas narrowly separates the roiling Atlantic from the cool Bight of Eleuthera.

The site of the earliest colonial settlement in the Bahamas started as a place of religious refuge.

In the Bahamas sits a lighthouse that is among the last of its kind.