Cliveden (pronounced ) is an English country house and estate in the care of the National Trust in Buckinghamshire, on the border with Berkshire. The Italianate mansion, also known as Cliveden House, crowns an outlying ridge of the Chiltern Hills close to the South Bucks villages of Taplow and Burnham. The main house sits 40 metres (130 ft) above the banks of the River Thames, and its grounds slope down to the river.