"narrow street in Boston's north end- eat and then walk it off!"
Prince Street is another enjoyable street in the North End of Boston that runs along the edge of Little Italy. There are many Italian restaurants, and I visited a great authentic Italian bakery on Prince St, Parziale's Bakery, that had the best cannolis. Luckily this is a great neighborhood to walk in, so you can walk off all the delicious bakery treats. This is a safe, quiet street in a historic neighborhood that is enjoyable to explore on foot.