Central Street is good both for its old architecture and for snacking as you stroll: long-standing shops and snacks line the street, and you can taste plenty of local flavours stop by stop.
Try an ice pop along the whole street to feel the local "the colder, the more ice" habit; street snacks such as grilled cold noodles, red sausage and pastries are everywhere for a quick energy boost.
Tips: eat in moderation and mind hygiene; go easy on cold foods in winter; it is mostly pedestrian, so watch out on icy ground.