In brief: Still owned by the Bolitho family, Trewidden spans 15 acres of informal paths, champion trees and walled gardens. As you wander, you’ll find traces of its ancient mining history, including an old surface working transformed into a tree fern dell.

Don’t miss: Essentially a maze of paths, Trewidden is best discovered by freely wandering. Highlights include the pond garden (with its whale tail sculpture) and the surprise police phone box near the north walk.

Find out more: trewiddengarden.co.uk