If you decide to visit Malaga, then I advise you immediately to rent a car, it can be done in luxury car rental malaga. Last time when I was resting there I found it, you can take good cars for a low amount per day.
On the Internet for a long time there is material about spiral staircases and how to properly design them http://staircasedesign.xyz/spiral-staircases/ Here is one of the best articles from which you can find out all the details about the structure of the spiral staircase.
