The Cape Cod Museum of Art exhibits work by outstanding artists acssociated with Cape Cod, Nantucket and Martha's Vinelyard, and Southeastern Massachusetts.  The age of the work exhibited ranges from early 19th century to current 21st.  They have lots of work by o painters - past and present.  If you want to get a feel for the art of the region here it is in one place.  From Memorial Day to Columbus Day they are open 7 days a week.  The museum is on the same campus as the Cape Playhouse and the Cape Cod Cinema so you can make a day of it - local shopping and galleries, a movie, lunch and one of the really good restaurants in the village and then dinner on campus at Center Stage Restaurant and then a play.  The whole place is about an hour and 20 minutes from Boston which makes it a great day-trip destination.