Very close to Atocha Renfe and Museum Reina Sofia and 15 min walking to Prado.
Good for 4 People confortably.
I recomend if you come by car to reserve at Park and go. I forget to do it and had a little problem. The lady that works there wasn't nice. But we insist and get a place for our car,but they don't want that you come out and in , so we left the car all the time and use the subway and walked.