In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

This abandoned naval battery stood at the ready as recently as the 1980s.

The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Seaside ruins of a settlement that date back to the first century B.C.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

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

A science fiction-inspired apartment building designed by a famous Spanish architect.

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