We liked the maritime museum http://www.shipsofthesea.org/. The collection of very large models (8-10 foot) is housed in a beautiful building, Scarbrough House, which was built in 1819 by a local architect. The restoration of the building is wonderful and an easy LF subject. The collection of very large scale ship models would be an great subject if you can gain permission to shoot. If no permission and you enjoy naval architecture it is a wonderful visit without photography.
We loved the fountains in the many squares mentioned above. There are regularly scheduled tour buses traveling a route of scenic high points. You can ride until you see something you like, get off evaluate subject matter, get on the next one with a transfer and continue. When you have selected what interests you, go back with car and gear and shoot.