I went to Greece as a toddler then after my parents divorced when I was 5 I just went to various friends of my mum's holiday homes but more than once.
One was a farmhouse in East Sussex, near Bodiam Castle. It was great but quite run down and full of spiders and dust. We seemed to spend most of our time either at a stream nearby or were taken to the seaside (Camber Sands and Hastings) by DM.
The other place was a friend's holiday bungalow in Ferring. Again we played in a stream/river that led to the sea or in countryside nearby. I made friends with a little girl whose parents holidayed in a static caravan. We went I think to Littlehampton.
Bradford-on-Avon (before it got posh) a friend of DM's moved to a farmhouse there and we stayed in an adjoining building or camped. Spent time on the river, messing around, making friends with older kids. Day trips to Bath and various places - White Horse, Marlborough, Glastonbury etc.
Cornwall - great uncle had a house on a cliff (in a cliff?), we camped near there.
Camping a lot - near Pett Level. Staying at family friends house when they went away in St Leonards. Staying at my aunt's holiday cottage in Dymchurch as teenagers.
A couple of trips to Normandy and Brittany in France. A 3 week holiday to Ireland where I caught gastro enteritis from a friend of uncle's in Bray, spent a week in Sligo General Hospital on a drip and in isolation and lost a stone in weight at age 11, all the while my step-grandma not wanting to call the doctor (money!).
I suppose they did instil senses of adventure but we were 70s/80s kids so were allowed to do a lot anyway by ourselves regardless of the dangers.
No kids so haven't returned to any places (but have returned by myself or with partner/friends). I did go to Dymchurch with a friend and her 2 kids to see where we used to go, it hadn't changed a bit, lost in time.