You can discover a lot about the health industry from going on a tour of a medical institution. Check to see if Hospital Gregorio Maranon is open to the public while you are in town.
Situated in Retiro, this health care institution is well worth a look. But you'll find loads more to see and do in the area. Plaza Mayor, Prado Museum, and Santiago Bernabéu Stadium aren't too far away from Hospital Gregorio Maranon.