The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

Where the sleeping monsters of Scotland's oil industry are left to rust.

An industrial site turned into Hungary's most cherished natural wonder.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

A once-magnificent collegiate church is falling into ruin.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

An abandoned beach resort in Normandy reclaimed by artists.

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

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

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

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

Indents in the pavement are all that remain from a grisly death machine in Paris.

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

Statue of death tucked in the University of Medicine courtyard.

Paris' linguistic guide to the international language of, yes, love.

This massive library holds what was once the largest book collection in the world.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.