The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Perhaps the most scandalous statue of America's first president.

There’s a hidden military meme engraved on the World War II Memorial.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

An ancient Egyptian temple in the middle of Madrid, Spain.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This landmark cemetery in Boston was created more than 300 years ago.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

Astounding collection of coin-operated games and automata.

The site of Paul Revere's historic two lantern warning.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The most confusing clock in New York.

Elevated freight railway turned wildly successful urban park.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.