La Muralla Roja (Spain) - Completed in 1973 - Height: 21 meters

Detail: La Muralla Roja, or "The Red Wall," is a striking apartment complex in Calpe. Its vivid, labyrinthine design is a homage to the Mediterranean's vibrant hues.

Interesting Fact: The building's name comes from its vibrant red and blue color scheme, inspired by the architecture of North Africa.