Splendide Hotel
"The French artist Dominique Gonzalez-Foerster transforms the gigantic 1887 greenhouse Palicio de Cristal in Parque de Retiro, in Madrid into "Hotel Splendide" in a show that offers its visitors an interactive experience.
This spatial intervention is a journey through which the viewer is transported to places and times where imagination mixes with reality and literature to create a liminal dream world, an installation piece with meaning beyond the individual objects.
In the center of the Palicio, the artist has recreated a single hotel room, visible from all sides but inaccessible. A carpet covers the floor of the room and around several rocking chairs invite the viewer to sit and partake in the work, diving into one of the many books that the artist selected for the occasion. José Rizal, Dostoevsky, Rubén Darío, HG Wells, and Enrique Vila-Matas are some of the authors whose work is highlighted by the artist."
From http://www.hoyesarte.com/evento/2014/03/el-palacio-de-cristal-se-convierte-en-el-hotel-splendide/ - translation mostly Google's.
I would have enjoyed this sudden discovery of a massive reflective iron and glass building lakeside in a forested park a bit more had it been less crowded, less tourists taking selfies and more time with the books and comfortable chairs and view of foreign trees and the birds which had gotten in. But there I was, tourist with cameras in hand, myself, equally part of the problem, so that is all I'll complain. I'm sincerely glad I found it, that the Ingress game app led me through the park to it when Google Maps couldn't load on the slow available phone data network, and got me to the metro, and then safely home. So it goes.