This is the Casa Batlló Stairwell in Barcelona. This house is a work of priceless design by the famed architect and designer Antoni Gaudi. I took this while climbing the stairs to the roof. It's a narrow courtyard of sorts with the house surrounding this central core. As I recall there were about five flights to the roof so on my way up I had plenty of opportunities to stop and gawk at the design.
This is a very big house, I could live comfortably on just one floor, even less. But if I did own the whole place I'd be sending texts to the kitchen to order meals, that would save a bunch of trips up and down the stairs. Then of course I'd need a Stair-master to get some exercise. I never said I was brilliant, if it was my house I really would have more money than brains.
I took a ton of pictures throughout the house, it's unlike anything I've ever seen. Actually everyone takes pictures inside. There's a nautical theme going on and it reminds me of a ship, or maybe something out of Jules Vern novel. When I Google other photos of this a few of them have an under water effect. Perhaps that was intended. In any case, here is a link to a search of stairwell photos from the house on Google: https://goo.gl/JW1jqj