L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This curious, round temple is the oldest still-standing marble building in Rome.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This museum glorifies the humble potato.

A desiccated merman and a walrus penis bone are among the oddities in this eclectic collection of shipwreck treasures.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The legendary building that needed ghostly approval before being built.

This region of the Perugia municipality has an unforgettable name.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Perhaps the only prehistoric monument with its very own public bus stop.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

An overlooked memorial honoring the local Washington residents who died in World War I.