The Felixtowe Museum is housed in the old submarine mining building to the right of the Landguard Fort entrance.
The exhibit rooms span a range of interests from the military to local social history.
Rooms are devoted to seaplanes, naval matters, defensive mines, a local mental asylum etc.
It is well worth a visit if you are visiting the peninsula. Check opening days before travelling, as the museum is manned by volunteers and the opening days seem limited.