Analysis finds urban areas in England where no one lives within 15-minute walk of nature
(www.theguardian.com)
I have lived in 7+ rural places. All of them have had some combination of nature reserves, forestry commission woodland, recreation grounds, open access land, walkable riverbanks and, of course, the usual footpaths and bridleway network within 15 mins walk.
I really don't know how common that is but it has always been my experience.