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

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Controversial site of what could be Europe's first pyramid.

Oriental bazaar in the heart of Sarajevo.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Op-art architecture designed for happiness.

Baroque celebration of the end of the Great Plague of Vienna.

The topiary maze at the Habsburg hunting lodge.

The oldest botanical garden in the world that technically isn't the oldest.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Fantastic stories on a miniature railroad.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

A musical instrument played by the sea.

This one-time health resort was used by aristocrats around the world.

Island wonderland for communist autocrats.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This huge metal monument is slowly being stripped to its concrete skeleton.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.