Tucked in the back of this amazing antique store is an important piece of medical history.

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

An artist's cute bronze subway sculptures belie his violent artistic past.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Visit the monolithic tomb of America's most famous general.

Lie in a hammock where George Washington stood.

There must be a pun in this haystack somewhere...

One of only two commuter aerial tramways in the United States.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

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

New York City's only preserved family home from the 19th century.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The greatest real estate coup of all time.

A posh members-only club with a literally dramatic history.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Berlin's old airport.

Cold war icon and onetime "hole" in the iron curtain.

The most visited, and possibly most controversial, museum in Germany.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

A fascinating insight into daily life in the Eastern Bloc.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.