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

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

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

This picturesque ghost town is located on the banks of the Suwannee River.

This abandoned bridge is now a favorite haunt for graffiti artists.

Georgia may have been on his mind, but this memorial in Florida shows that Greenville was really Ray Charles's childhood home.

How Quincy, Florida became the richest town per capita due to one man's shrewd business acumen and taste for fizzy drinks.

This museum chronicles the history of a leprosy quarantine hospital that then became a refuge.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

The largest caravanserai in Cyprus also includes amazing examples of Ottoman architecture.

This no man's land slicing through the island is strewn with abandoned relics of another time.

A unique art center and shop just below a United Nations Checkpoint in central Nicosia.

Eat green onion ice cream and other allium-centric treats at this unusual museum.

A former plant in one of the hubs of U.S. steelmaking has been turned into this museum celebrating the history of American industry.

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

The oldest operating hotel in Illinois enjoys a historic (and some say haunted) past.

Dozens of large steel sculptures fill this two-acre park outside a former blacksmith's studio.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

A unique botanical garden housed in three giant geodesic domes.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

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

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The tangled roots of a giant banyan tree have fully reclaimed the ruins of this abandoned warehouse.