South of Helmsley lies the superb ornamental landscape of Duncombe Park estate, laid out in 1718 for Thomas Duncombe (whose son would later build Rievaulx Terrace) with the stately Georgian mansion of Duncombe Park House at its heart. From the house (not open to the public) and formal gardens, wide grassy walkways and terraces lead through woodland to mock-classical temples, while longer walking trails are set out in the landscaped parkland, now protected as a nature reserve.