Tupgill Park Estate, Coverham, Middleham, Leyburn. The Forbidden Corner is a unique labyrinth of tunnels, chambers, follies and surprises created in a four acre garden in the heart of Tupgill Park and the Yorkshire Dales. This is a day out with a difference. Open daily. 10am – 6pm. Adult £11, child £9, family £38. Booking essential. Tel: 01969 640638.