By far, the largest temporary ice skating rink I've ever seen! Every winter, the plaza in front of…read morethe Rathaus turns into a giant ice skating track, complete with lockers, toilets, food stands and a warming house. Plywood is laid down over the whole area so skaters can come off the ice and grab a gluhwein or a snack. The atmosphere is festive - they've got music playing and people seemed to be having a great time.
Skating is fairly reasonable at EUR $6.50, and they'll rent you skates if you need them. There are a few large "open" areas for skating as well as a long track that winds in and out of the grounds. Though I wasn't in the mood to skate, I absolutely enjoyed watching everyone from small children to seniors go 'round the track.
Because it was a chilly day, I also really enjoyed their gluhwein - it was quite a generous mug of tasty hot wine for EUR $4. The Mister had a currywurst which he really liked too. Also available for non-skaters is a carnival ride that takes you up 100' or so to get a great view of the track or the city.
If you're visiting during the winter months, the Eistraum is definitely worth a stop!