The East Park, leading down to Menagerie House and Menagerie Wood, was the site of some of the earliest and most important landscape design.

William Wentworth removed much of his father's layout of octagonal pool and cascade with formal avenues; the limes that are today just to the south of the Church are remnants of these avenues.

In their place, William planted individual trees and small copses, disposed in informal groups. Several of these trees survive, most notably a copse of beech trees, not far from the southern border of Coronation Wood, and a group of sessile oaks atop a knoll, in the middle of the Park.

In the middle of the Park, William transformed what had been stew ponds into an elegant, serpentine lake. Across the Serpentine, a Palladian Bridge was erected, carrying an informal drive that led from the Strafford Gate, near the Menagerie House, through the Park and towards Wentworth Castle.

Over the following two centuries, the eastern parkland was the subject of further change and some neglect.