I went back to the Fitzwilliam Museum in Cambridge, the second time I've been there. The last time was for an exhibition called Vermeer's Women (I blogged about it) but I didn't have time to have a proper look around the rest of the place. Now I have, I see what I missed.
The museum's been renovated recently and it shows. The rooms are bright, clean and spacious :
There's also a lot to see: the place is big and very ornate. A large collection of ancient world artifacts (Greece, Rome, Minoan, Persia, Egypt etc.), ceramics and pottery, as well as a lot of great art.
a detail from Pieter Brueguel the Younger's "Village Festival" showing how much has changed in the intervening 450 years!
Like the other museums listed, it's free and only about 20 minutes from the station by foot.