The Darnley Mausoleum, or Cobham Mausoleum as it is often now referred to, is a Grade I Listed building, now owned by the National Trust and situated in Cobham Woods, Kent. It was designed by James Wyatt for the 4th Earl of Darnley of Cobham Hall according to detailed instructions in the will of the 3rd Earl of Darnley. It was never used for interments. The woodland is part of the parkland laid out by Humphry Repton, and is 1.6 km from the North Downs Way.