They're [b]FREE !!![/b]
Loads of places to visit including many that are normally closed to the public.
www.heritageopendays.org.uk
Nice PSA, thanks! I've just checked the map and there's loads of stuff happening locally. Unfortunately the one thing which would probably be the most interesting - guided tours of the local Victorian era prison which closed a few months ago - are all booked up already 🙁
I'm pleased that someone has found it useful! It's a shame that you're not getting to see what you want but not everything has to be pre-booked.
If anyone is in the Portsmouth/Gosport/Southampton area there are loads of things to do particularly for kids.
Also, an idea for those in north Hampshire - combine a visit to Bramshill House with the singletrack next door in the Forest! 8)