If you have an hour to spare and don’t want to spend any money get over to the British Museum.
Staffordshire hoard: they are showing a small sample of the biggest hoard ever found of Anglo-Saxon treasures. They are still uncleaned but the quality of the gold and semi-precious stones is clear.
Warriors of the plains: in room 91 (upstairs) there is a fascinating exhibition about the native American from the plains. This includes head-dresses (plus scalps, tomahawks, peace pipes. However these are not John Wayne’s ‘indians’ but a semi-disappeared culture full of myths, symbols and complex rituals. One for anthropologists.