Museo Cerralbo
Calle de Ventura Rodríguez, 17, Argüelles
The Marquis of Cerralbo lived in this palace in the 19th and 20th centuries and designed everything from the staircase to the displays, to the gardens he sketched out himself. Today his absolutely over-the-top vision (he always hoped it would become a museum) remains faithfully intact complete with his collection of masterpieces by Spanish greats like El Greco and Zúrbaran, early photography, and Japanese armor from the Edo period.