Museum dedicated to the terror regimes of Hungary.

This garden houses the remains of the ancient Greek port of Marseille.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

The world's most delightful not-NOT-religion welcomes visitors to the town of Templin, just like its more stoic peers.

Ample proof that watery ends make for well-preserved, millenia-old mummies.

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The celebrated eyesore created by starry-eyed sweethearts.

The video game-themed street art first popped up in the French city.

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

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

This Parisian gem is one of the most incredible ethnographic museums in the world.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

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

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The first green space constructed on an elevated viaduct.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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