Arriving by car it was a little tricky for me to identify the building's door, which is right next to the Chinese restaurant ChaCha Moon in other road side of Reina Sofia. If you are renting a car there is a public parking lot with few spaces at the door, across the street there is another Sixt parking lot, you can park near the reina sofia museum and in the last case at the atocha station, which is a few meters from the building.