I'd never really cared about going to Austria until I saw this in Architectural Record:

I would 100% stay in one of those. If you don't feel like following the link at the bottom, I'll sum it up here. Designed by Andreas Strauss, Dasparkhotel (The Park Hotel? I'm not German) is minimal and cool. The 9.5-ton concrete tubes are sealed with a clear varnish to keep out moisture, and the thickness of the walls is enough to keep renters cool. Each appears to have a bed, table, lamp, skylight, and cheerful painting on the back wall, which I guess you would need if you were sleeping in construction materials.

www.arplus.com/broch/articles/july%202006%20pdfs/arjul06straussdone.pdf