A fun way to stay in Warnemünde is this youth hostel located in the edifice of a former weather station. The equipment on top of the tower is still used for providing data for weather forecasting.
The youth hostel in Nuremberg (Nürnberg) is located in a part of the Imperial Castle complex high over the city. Though the rooms are pretty modern, there are also several atmospheric parts. Interesting detail: You can find huge QR codes all over the hostel telling you interesting details about the city of Nuremberg.
While crossing Lake Constance from Meersburg to Constance by boat I took this photo of a conspicuous white colored tower named Otto-Moericke-Turm. It is a former water tower which houses a youth hostel now. A fine address if one would like to stay at something special.