Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

The Tudor-style cottage in the middle of the square is not quite what it seems.

This ancient Egyptian obelisk still bears the wounds of World War I.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The "Seinfeld" diner.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

One of the largest underground systems runs under Canada's largest urban center.

The home, museum, and death site of Kodak's influential founder.

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

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

A little sculpture with a large wardrobe.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

One of the world's oldest olive trees, thought to be over 2,000 years old.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.