Considering the Hotel Am Bismarck in Mannheim?
A VT member wrote the following comment about visiting Mannheim:
Park behind the water tower by King_Golo
The wonderfully designed park behind the water tower is a great place to meet, hang out, watch people and cool your feet in the fountain. Bruno Schmitz designed the park with its two opposing archways and a big fountain in the middle. In summertime, the park is full of people enjoying the sun there, while in winter, Mannheim's Christmas market takes place here.
While nearly everybody does it, the police is not too keen on people playing in the water or relaxing on the lawns. Apparently, they come checking every half an hour or so if everybody's behaving well - it might not be a good idea to be swimming in the fountain just then! ;)