It's good luck to be mocked by this monkey.

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

This lurid German fountain plots the sad course of marriage from dating to death.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

An abstract monument to a symphonic composer.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

This artistic fountain display pays homage to this area's theatrical history.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Enter the cabin of a life-sized Hindenburg replica.

A remarkable two-country morph, this town is part of Germany legally but is by all other measures Swiss.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

There's an exclusive Beefeaters pub hidden in the Tower of London.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

The only house in Oregon designed by the famous architect, Frank Lloyd Wright.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

Dine like an American revolutionary at Colonial Williamsburg.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

The mysterious image is believed to show Edward Hyde, 3rd Earl of Clarendon, in a beautiful blue dress.