Check if the museums are open. There are two art museums, The Yale Art Gallery and The Yale Center for British Art. Both definitely worth a visit. Beinecke Library and the area around it (on Yale campus) is nice. There’s an interesting cemetery off Yale campus (Grove Street Cemetery) that’s nice for a quick stroll (closes at 4). Edgerton Park is really pretty, has a few small greenhouses that are open to the public, great place for a walk. The East Rock neighborhood is very walkable, has a new food hall and a brewery, lots of cafes, beautiful Victorian architecture. Home of Modern Apizza, one of the best pizza places in town. I think the drive up to the view from East Rock Park is closed but hiking trails are open if you want to take a short uphill hike. Wooster Square Park is near some of the pizza places, it’s a small square surrounded by beautiful 19th century homes. Some interesting shops downtown and over in Westville, which is a cute neighborhood about 10 min drive from downtown. A few independent bookstores, Strangeways, vintage clothing and housewares, art supplies, records.