Niederdorfstrasse is a pedestrian-only promenade through Zurich's Old Town, filled with charming alleys, historic buildings, and lots of restaurants, cafes, and shops.
The cobblestone lane starts near the Central tram stop and stretches all the way down to Bellevue. It takes about 15 min to walk directly, but much longer if you explore all the side alleys and linger at the window displays.
The street changes names a few times: Niederdorfstrasse, Marktgasse, Münstergasse, Oberdorfstrasse. Just wander and make sure to explore the side streets, particularly: