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

Baroque celebration of the end of the Great Plague of Vienna.

Go inside to really appreciate this 500-year-old technological masterpiece.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

A miniature village mimics the surrounding buildings so well it includes itself.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The Habsburgs' royal collections of art and wonders.

The most loyal of little dogs, or a Victorian era publicity stunt?

A six-ton wedding present for the King of the Scots.

The final resting place of soldiers' loyal canine companions.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

The Victoria-era quarantine station for Sydney.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

Home of the world's largest crocodile.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

This antique prison is a tourist attraction with a sordid past.

The world's largest collection of witchcraft regalia.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

France's most famous cemetery, with some of its most curious tombs.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

The "Prussian Versailles" that is as glorious today as when it was built.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.