Seat of the Duke and Duchess of Devonshire for centuries.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

The site of the climactic scene from the classic horror film is now a historic landmark.

Sweden's "good old days" painstakingly re-created in a model village.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.

A castle built by an eccentric medieval enthusiast in rural Ohio.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The first American department store, and home to the largest operating musical instrument in the world.

The only electricity pylon under whose legs you can go by boat.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

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

Secret Soviet city once home to Russian cosmonauts and space training facilities.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Moscow's imposing monument to the Space Age.