The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

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

The prototype for all Nazi concentration camps.

The taxidermied remains of a once-great parrot.

The largest of London's subterranean rivers and once a mad, bad center of London life.

A hands-off space for graffiti artists to hone and display their skills.

An unusual round church in London with a Templar past.

One part local history, 99 parts gruesome haunted house.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

The celebrated eyesore created by starry-eyed sweethearts.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

The largest underground church in Europe.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A church of bones, decorated with 40,000 human skeletons.