Things to see from the air? (Berkshire/Buckinghamshire, UK)

[Savage_UK]

Evening fellow (UK) Pprune people,

Not strictly a flying instructor question but figured this community would probably have some insight...

I'm looking for some places around the Berkshire/Buckinghamshire area that would make up a decent route for an aerial tour of our beautiful English countryside (trying to show off the best of British to a kiwi mate). Anyone have any recommendations for interesting buildings/sites that can be seen from a thousand feet or so up. Preferably something I can point knowledgeably at and spout off some oh-so-very interesting history/trivia.

Already had suggestions of Donnington Castle, Highclere Castle, Greenham Common (avoiding restricted area of course) in Berkshire and Chequers in Buckinghamshire....

Any others within, say 20 mins flying time of White Waltham/Denham/High Wycombe that people know of?

Thanks!