Although this is a one-of-the-kind hotel, there are now two... One in Austria - Ottensheim and the other near Essen in Germany. They have been designed from the outset to use worldwide standard concrete drainage or sewage pipe sections - so you could well see more of them in the future.
The idea of Andreas Strauss in 2004, the first rooms were provided in Linz. Moved to nearby Ottensheim, rooms are accessed by a digital keypad, whose code is provided by the self service website upon booking acceptance.
The beauty of these pipes is that their concrete utilitarian look needs little alteration to make them habitable - a coat of varnish is all that is necessary. The tubes have also have received wall paintings by the Austrian artist Thomas Latzel Ochoa to make them seem a little more user friendly.
Each tube weighs 9,5 tonnes – so although some might be tempted to rock or vandalise them, they are incredibly robust and need little maintenance. More advanced lock and electronic keypad systems are being fitted in 2007, but the original concept is working very well.
Like cave hotels, Das Park Hotel is fairly cool in the summer, and perhaps still warm in winter, although at the moment the hotel is only open from May to October.