On a cornerstone of the City Museum is the head of a monstrous serpent stolen from an Aztec pyramid 400 years ago.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

This extraordinary art museum is like a secret world on the edge of Mexico City.

The modern birthplace of Irish freedom.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

Floating swimming pool within a moored vessel.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

A fascinating insight into daily life in the Eastern Bloc.

Started as a kitchen garden, now the second largest botanical garden in the world.

An eerie, derelict amusement park in Berlin.

This remarkably intact, 260-year-old cargo ship is only visible at the lowest of spring tides.

Every May, townspeople welcome summer with a bizarre pagan parade led by a man wrapped in garlands.

Two gilded cherubs perched on a church bell tower have been reminding visitors of the finitude of life since 1760.

During the heyday of fishing in Hastings, there were more than 100 of these storage facilities.

This South London cemetery holds the remains of more than 15,000 people.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."