Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

This enchanting green space houses a labyrinth lined with toxic plants.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

This modern sculpture looks out over the sea and amplifies sound from the inside.

Made up of 3,200 recycled glass bottles, this tree pays homage to Asturia's love of cider.

Op-art architecture designed for happiness.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

A thought-provoking outdoor art installation sits in the seat of German law.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

The world's first floating farm is staffed by one human, three robots, and 35 cows.

Wind power station for making famous Ketel One vodka.

A statue of Schiedam's beloved gin mascot.

An art installation memorializing a tram stop, which became a tram stop.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A set of parking garage escalators doubling as a historical overview of Rotterdam.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

An icon of International Style architecture on the outskirts of Rotterdam.

World's largest barrel containing an inn.

This small condiment museum makes all manner of mustards with a 200-year-old mill.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.