Das Parkhotel is located in Austria, designed by art college graduate Andreas Strauss. These concrete repurposed drain pipes are organized into clusters of three, and placed in fields beside the Danube River. Facilities like shower, bar and cafeteria are in a central location. The hotel currently works on the honor system, which means you leave behind however much you think is fair or can afford for the time of your stay. Interesting hotel and interesting idea. Thanks to Kevin for submitting this hotel.