Буэн-Ретиро
The Casón del Buen Retiro was originally built as the ballroom in the 17th century, the "Salón de Baile", of the Buen Retiro Palace, of which now only two buildings, the Casón and the Salón de Reinos still remain. The Casón is located in front of the Puerta de Felipe IV entrance on the west side of Retiro Park.