Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This failed condo development was reborn as a street art hub.

One part antique store, one part curiosities hodge-podge.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This golf ball–shaped former desert real estate office now houses a UFO museum.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

St. Augustine's record-setting narrow street was designed to protect against pirates.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

It's a pretty creepy lock-up.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

Metro station with a claim to rock n' roll fame.

Cold war icon and onetime "hole" in the iron curtain.

Tiny memorials honor individual victims of the Holocaust.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.