The most decorated dog of World War I is preserved in the Smithsonian.

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

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

Ancient paintings known as the "Sistine Chapel of Cave Art."

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

Of course Salvador Dalí lived in a castle...

French commune at the heart of conspiracies.

A Romanesque tower appears when water levels drop.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

15,000 year old bison sculptures.

A beautiful but toxic fountain of mercury.

An isolated village literally built into the crevices and rock formations of a mountain.

Ruins of a German Castle on top of a towering stone pillar.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

Silent memorial, using bone conduction to take people back to the Dresden Bombing of 1945.

A hundred copies of Antony Gormley's naked body stare out across the water.

The oldest inn in England served brew to the crusaders.

Peek through a transparent pyramid and drink in the mountain made of books.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Two gravestones clasp hands over the religious divide.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

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

The curious and tiny collection contains some very odd objects.

A church that bred legends, and served as an inspiration for the Da Vinci Code.