These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The center of the only hemisphere that awards visitors with a commemorative coin.

Five acres of divinely inspired folk art.

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

This pebble beach is so beautiful that taking its rocks is against the law.

Robots, lasers, and whoopee cushions, oh my!

Whimsical sculptures dot a woodland path surrounding their creator's old summer cottage.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A unique botanical garden housed in three giant geodesic domes.

The preserved remains of the former Milwaukee County Hospital for the Insane are hidden in the wooded grounds of County Park.

These modest Midwestern formations are kin to Niagara Falls' impressive cliffs, more than 600 miles away.

This whimsical sculpture garden is a local treasure.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

19th century tunnels burrowed under Liverpool.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

Once the home of a hermetic monk, this cave now houses a small church.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.