Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

A jewel of the Mexico city skyline now slowly crumbles after surviving an earthquake.

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

The only castle in North America to ever house European sovereigns.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

This French cemetery houses some of the most exquisite examples of funerary art in Mexico City.

One part antique store, one part curiosities hodge-podge.

This failed condo development was reborn as a street art hub.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A reminder to choose water over wine since 1888.

This former crime corner has been turned into an eclectic community center.

Salute the leader of the proletariat.

This museum houses an imposing skeleton army comprised of creatures great and small.

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

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

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.

A modern-day Lascaux cave underneath Paris.

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

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

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

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

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