Grange Arch, also known as Creech Folly, is an 18th-century folly that is located near the second highest point of the Purbeck Hills, Ridgeway Hill (199 m), in Dorset. It lies within the parish of Steeple.The folly, which was built by the owner of Creech Grange, Denis Bond, is built in the form of a triple arch of ashlar stone. The central archway is surmounted by battlements and flanked by stone walls with smaller doorway arches.Today the arch is owned by the National Trust.