New York City's smallest piece of private property.

A dilapidated dock tells the story of Titanic's missed arrival.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

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

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

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

Macabre astrological automaton clock dating to the late 1400s.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

A stone obelisk towering over the surrounding countrysides beckons hikers across the rolling moors.

Astonishing rock formations dot the Brimham Moor landscape.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

Europe's largest prehistoric mound – burial site of a legendary king?

The largest stone circle in the world has ended up bringing up more questions than it has answered.

This hilarious English intersection is an automotive whirlpool.

The world's oldest model village.

Human-made caves excavated to hide a secret society of wealthy pagans.

A well for a well, this anachronistically Indian-styled water pit was built in its small town home in gratitude for a similar favor.