Wyastone Leys is a country house estate and Grade II listed building situated near Ganarew, in the southwestern corner of The Doward, in Herefordshire, England. The house and estate has also been known as The Leys or Lays House. It is located 2 miles (3.2 km) from Monmouth and 8 miles (13 km) from Ross-on-Wye. The house is in close proximity to the River Wye and less than 50 metres (160 ft) from the county boundary between Herefordshire and Monmouthshire.

Ganarew is a village and small civil parish in south Herefordshire, England near the River Wye and the border with Wales. The village is located 0.62 miles (1.00 km) southwest of the village of Whitchurch on the main A40 road, and lies within the electoral ward of Kerne Bridge. The village is about 2 miles (3.2 km) from Monmouth and 8 miles (13 km) from Ross-on-Wye. It contains the Church of St Swithin and Ganarew Manor.