Currently I live in Kraków, Poland, the very big advantage of this city is that it is close to the mountains.
Once we went together with friends to spend new years eve in Bukowina Tatrzańska. The day of 30th december me and my boyfriend went walking o Morskie Oko, it was very slice to walk there, but the way is very easy (you can walk long part even on asphalt road lol :D). In the winter it is totally frozen, so many people (together with us) walk on the lake. It is very beautiful, recommending :)
(all photos are taken by me)