Ghent, Belgium. Called the Hotel Gent, it is a project by Japanese artist Tazu Rous, who has constructed a temporary room around the clock tower of the historic station. Presumably the clock doesn't strike, or visitors would have to be issued with ear plugs.
These temporary hotel rooms are all the rage. David Kohn's 'Room for London' in the form of a ship is perched on top of the Hayward Gallery for the whole of this year.