I've visited:-
Boleskine House (1978)
Peter Grant's mansion Horselunges Manor in Hellingley (2015)
Jimmy's old mansion Plumpton Place (Featured in TSRTS) (2016)
Bron yr Aur cottage (2017)
Tenuous connection:- Lindisfarne Castle on Holy Island, which was once owned by Henry Hudson (Country Life founder), who also lived in Plumpton Place.
I also chatted to John Bonham briefly in a pub near Kidderminster in 1978.
The new Peter Grant book is excellent, with a few very rare photographs, he seemed to have a shit life towards the end, but the last couple of years he found contentment.
An amazing man by all accounts.