Castillo Papa Luna is shared between the regional headquarters of Aranda and the guesthouse. The main access is through the axis of the building from both south and north sides. The first floor belongs to the guesthouse, directly entering through the Mausoleum or Chapel room where the reception is located. On the same floor are the central services, the bar and the restaurant, as well as various banquet rooms.

On the second floor it is located the living room and the 26 rooms, 4 of which have a terrace to the north facade. The top floor is completed by a special bedroom for the views available, is located in the southeast tower.