My friend and I had a day out in Oxford last week and we went to the Pitt-Rivers museum. I loved it, it was just full of collections of so many different types of things, on 3 levels. I especially loved the key collection - there were displays of so many different types of objects from different times in history, from all over the world. It was fascinating and inspiring!
We had to go through the Museum of Natural History to get to the museum, and this itself was great - it was really good to see the animals, birds and butterflies up close and they were amazing colours (see the butterflies and beetles photo!)
Admission is free and if you are in Oxford I'd highly recommend going there! The Pitt-Rivers Museum website is here.