London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Indents in the pavement are all that remain from a grisly death machine in Paris.

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

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Balconies that have a most unusual accent.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Cryptic messages embedded in the New York City sidewalk.

Elevated freight railway turned wildly successful urban park.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

The most confusing clock in New York.

Longest canal tunnel in the world, abandoned in the 1960s.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

One of Europe's oldest libraries.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Largest Roman Catholic church in North America.

At 207 feet, one of the world's longest continuous escalators.

This striking art museum holds an amazing series of curiosity cabinets.

A place to eat for on-the-run agents and espionage enthusiasts.

World War II bunker still standing on the New Jersey beach.

A single tree's 2,800 aerial roots give the appearance of a complete forest.

1513 Turkish world map, full of European state secrets and snarky commentary.

Walk through living pictures and music in the Cathedral of Images.

A unique underground structure dating back to the 1st century BC.