The best nature parks in United Kingdom are: Northumberland, Snowdonia, The Cairngorms, Yorkshire Dales, Peak Distric, South Downs, The Broads National Park, Brecon Beacons National Park, Loch Lomond and the Trossachs. more info you will find here https://www.ukallive.uk/best-natural-nature-parks-in-the-uk/