A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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

A beautiful but toxic fountain of mercury.

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.

Countless grotesque faces stare out from this eerie Prague art wall.

Eighty million natural history specimens call this gargantuan museum home.

One part local history, 99 parts gruesome haunted house.

A temple to modernity, tucked away amid Barcelona's more well known museums.

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

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

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

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

The most visited, and possibly most controversial, museum in Germany.