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

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

Though illegal, city officials have made an exception for this work of art.

This church on a Tohono O'Odham reservation has stood since 1797.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

The naturally mummified body of a peasant girl saint.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Fortified medieval tower house with lovely roof garden.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This striking art museum holds an amazing series of curiosity cabinets.

A place to eat for on-the-run agents and espionage enthusiasts.

The Bong-area park police have asked visitors to please, stop stealing the signs.

Wisconsin's most celebrated export gets the royal treatment on I-94.

Funhouse of found art and participatory sculpture.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

The "world’s largest honky-tonk" also has its own indoor rodeo arena.

Elevated freight railway turned wildly successful urban park.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Climb to the top of its spiral spire for spectacular views of Copenhagen.