Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

A 12th-century fortress containing some of Berlin's oldest buildings.

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

This 600-year-old home seems to defy physics.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This historic stone bridge has an entire neighborhood clinging to its sides.

The fairy tale castle of the "fairy-tale king."

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

Folklore and history carved into Brittany's coast.

This bridge was constructed from the rubble of the infamous Bastille.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

There has been an astronomical clock on this spot since the 14th century.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

The famous winding walk at Chartres is surrounded in mystery and myth.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

19th century pendulum and a clock restored by a rogue group of guerilla artists.