Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Cold war icon and onetime "hole" in the iron curtain.

Berlin's old airport.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

The celebrated eyesore created by starry-eyed sweethearts.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

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

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Immortalized by artists, this church incorporates a medieval lighthouse into its shoreside structure.

The narrowest street in Paris.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

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

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

France's high-tech, future-themed amusement park.

Walk through living pictures and music in the Cathedral of Images.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

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

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."