Westonbirt Arboretum

Forestry Commission, Tetbury, GL8 8QS

One of the largest of its kind in the country, the National Arboretum at Westonbirt holds over 18,000 trees and shrubs across 600 acres. It’s a huge site, best explored on one of the seasonally changing trails – pick up a leaflet on arrival for the current routes – and best experienced in spring or autumn, when the flowers (spring) or foliage (autumn) are at their most vibrant. You can stock up the ingredients for a majestic picnic at nearby Tetbury, home to Prince Charles’ Duchy Farm Shop.