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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

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

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

France's national museum of scientific and industrial instruments.

A mechanized clock where a man fights off a dragon, crab, and rooster.

France's most famous cemetery, with some of its most curious tombs.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Frida Kahlo's childhood home, now a museum of her life and works.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

Ukraine's oldest operating pharmacy now offers guests a fascinating walk through apothecary history.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Water and windows define this defensive Italian well.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This snug medieval lane is one of the narrowest streets in the world.

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

Ride the subways of yesteryear.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.