A park where people have been going to feed friendly pigeons since the 18th century

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

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

Everyone from Alan Ginsberg to The Rolling Stones has stopped by this classic dive bar.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

Fuel your honky-tonking with this venue's unbeatable “Recession Special.”

East Nashville's oldest dive bar will bring you back to life with animal-style bar fare.

The pan man stands as a testament to the functionality of American cast iron cookware.

The secret city built by the Manhattan Project.

This two-room shotgun shack in Tupelo is the birthplace of a King.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This beautiful spit of land was once the summer playground of the king of Spain.

This 19th-century fountain's namesake animal isn't what you think it is.

Giant topiary dog once played a role in a terrorist bomb plot.

The world's largest fire hydrant is supposedly tornado-proof.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

This kitschy tavern is also home to rare early editions of "Treasure Island."

This small beachside park commemorates the possibilities of discovery.

Leave it to Key West to drop a real-live drag queen instead of a ball to mark the arrival of the New Year.