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

A surrealist timepiece by the artist of melting clocks.

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

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

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

This ancient theater was once the home of fierce gladiatorial battles.

This stone memorial commemorates a group of French patriots slain by French fascists.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A hilltop monastery on the Greek island of Hydra.

This building was once the most magnificent mansion in Nafplio.

One of the best-preserved medieval streets in Europe.

Scores of wax baby figurines add an unusual mood to this beautiful church on the Greek coast.

A staircase made of gravestones leads up to this church built into a giant rock.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.