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

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

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

A kaleidoscopic warehouse-maze of handmade neon signs.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.