The Castle sits in extensive grounds, which the Dukes of Atholl have altered and added to over several centuries. Notable among the features are Diana's Grove and the Hercules Garden, both laid out in the first half of the 18th century, and rare examples of their period. Both are adorned with lead reproductions of Classical statues. The Dukes of Atholl were early and enthusiastic tree planters, and Diana's Grove contains some of the tallest trees in Great Britain. The Hercules Garden, recently restored, is a rare survival of a walled formal garden with an artificial lake and islands, surrounded by plantations of fruit trees. There are several other follies, bridges etc. of various periods.