Westonbirt Arboretum comprises some 18,000 trees and shrubs, over an area of approximately 600 acres. Its 17 miles of marked paths are popular with visitors, and provide access to a wide variety of rare plants. There are two main areas to explore. The Old Arboretum is a carefully designed landscape offering beautiful vistas, stately avenues, and a host of rare and exotic trees from across the globe dating back to the 1850s. Silk Wood is a very different experience: although it also contains many exotic plantings, at its heart is a traditional working woodland, dating back to the 13th century.