Site of a classic 19th-century physics experiment to prove the earth is rotating.

A surrealist timepiece by the artist of melting clocks.

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

Notorious artist squat renovated into legal studios.

Executions were once held near this beautiful 18th-century fountain.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

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

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

For more than a century, Parisians have come for affordable dishes in a grand converted train station.

The world's largest boar is a huge steel titan found at a French rest stop.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The burial place of one the greatest Arthurian authors, with the sword in the (grave)stone.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

A Spanish town built into the cliffs.

Amsterdam's Red Light District leaves little to the imagination.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

Single runway interrupted by a busy road that cuts across its middle.

The world's most elegant power lines.

This lesser-visited World Heritage site in Athens boasts an impressive ensemble of medieval gold mosaics.