Deluxe Town Diner - 627 Mt. Auburn Street
If you only go to one place in Watertown, go to Don Levy's Deluxe Town Diner. Don used to own The Blue Diner downtown, and has taken this iconic train-car diner and made it into one of those places that just makes you happy to be inside it. They have a traditional diner menu as well as adventurous and delicious dinner entrees that have probably never seen the inside of a diner before.