Tilly Whim Caves consists of three stone quarries in Durlston Country Park, 1 mile (1.6 km) south of Swanage, on the Isle of Purbeck, in Dorset, southern England. The Tilly Whim Caves are a part of the Jurassic Coast. The name "Tilly Whim" may have been derived from a former quarryman, George Tilly, and the type of primitive wooden crane used at the time, known as a "whim", also called a derrick or gibbet. However, Tilly Whim lies at the southern end of the Manor of Eightholds and there is a common field called Tilly Mead at the northern end of the estate.