My husband and I will be in London & Scotland in September. I have a free pass for the two of us for the following properties: (thanks to my niece works at Legoland in the US)
Alton Towers Resort | Chessington World of Adventures & Zoo | Dungeons | Earth Explorer | Gardaland | Heide Park | LEGOLAND | LEGOLAND Discovery Centre | London Eye | Madame Tussauds | SEA LIFE | Seal Sanctuaries | THORPE PARK | Warwick Castle (I know some of these are outside the UK or London)
We are planning on The London Eye/Sea Life in London and maybe the Dungeons in Edinburgh (it's close to where we are staying)
We are undecided about Madame Tussauds (although I know it's popular and we are staying close to Marylebone Rd. while in London)
So, if you had some free time, no kids and a prepaid oyster card, where would you go and what have you particularly enjoyed? (not in lieu of, say, the British Museum or other "must see" sights - not my first time in London, but is for my spouse)
Bonus (or not!) for someone if interested - I can transfer the pass when we're done - should have a few visits remaining and it expires the end of 2009.