It's always difficult to answer questions like this without breaking the PPRuNe Commercial Advertising rules. But as you are an aviation person there's lots of choice.
Kermit Weeks - of course.
Skydiving, maybe just a Tandem. A place beginning with Z......
Kennedy Space Center always worth a full day - and check their launch schedule.
Seaplane ride. Best one is out of Key West to Fort Jefferson, should you be going down The Keys.
Flying trips - not certain if you are licenced in the UK. Some operate out of surprisingly busy commercial fields. It can be a hassle getting your licence validated for a quick trip, just take an instructor.