Upminster forms part of the tourism strategy for the borough. It is the location of Upminster Windmill, one of the few remaining mills in Greater London and is Grade II* listed. There is also the Tithe Barn Museum, containing artifacts of domestic and agricultural use. In the west of Upminster is Hornchurch Stadium, which is the home ground of A.F.C. Hornchurch. Upminster is often associated with Ian Dury and his 1981 album "Lord Upminster" is named after the town. The speed of sound was first accurately calculated by the Reverend William Derham, Rector of Upminster, thus improving on Newton's estimates. Derham used a telescope from the tower of the church of St Laurence, Upminster to observe the flash of a distant shotgun being fired, and then measured the time until he heard the gunshot with a half-second pendulum. Measurements were made of gunshots from a number of local landmarks, including the Church of St Mary Magdalene, North Ockendon. The distance was known by triangulation, and thus the speed that the sound had travelled could be calculated.