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.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

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

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

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

The celebrated eyesore created by starry-eyed sweethearts.

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

Tiny memorials honor individual victims of the Holocaust.

A museum dedicated to a Cold War era sausage.

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

The last four extravagant street signs of London's historic banking street.

Huge winged monument in the United Kingdom.

One of England's most famous churches hides a pair of little known architectural treasures.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Explore nearly 400 years of English middle-class home life.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

Catacombs turned marketplace.

Hear the quietest sound from across the dome.

The curios of pharmacist and collector Henry Wellcome.