A vast array of tropical plants collected by a vacationing couple.

Plaques on its facade commemorate the Tiber's most destructive deluges.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Five candy-colored villages on the Italian Riviera.

The bomb-ravaged remains of of a colossal Neptune.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

This tiny chapel withstood a massive mudslide and flash flood.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

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

It's a pretty creepy lock-up.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The oldest still-operating tavern in the United States was once owned by a pirate.

An elaborate memorial to a man local legend says died of a broken heart.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

Ruins of a once-prized railroad station in New York.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

Found: Garden of Eden in Miami-Dade County, Florida.

The highway's southernmost spot is a beloved local attraction.

Electrical pylon in the shape of Disney's beloved mouse.

A time capsule of Floridian history fights to survive on the banks of Chokoloskee Bay.