In reply to George Fisher:
Try
http://www.lakesaquarium.co.uk/
Its on the shores of Windermere - you can get to it using the Hawkshead ferry, adds something to the journey
Don't forget Carlisle Castle and Tullie house museum in Carlisle - not too far to travel.
There's clip and climb at Maryport and another aquarium.
Beacon centre in Whitehaven for the rum trade exibition.
Sellafield for the nukes are good exibition.
The Lakes distillery at the bottom of Bassenthwaite
Post edited at 12:19