TQ 5875 SWANSCOMBE AND GREENHITHE GRENHITHE 989/9/10009 Flint Cave in the grounds of Ingress Abbey at TQ 5898 5904 II Garden folly. c1833. Flint with stone dressings. Exterior has cambered stone arch, two end ogee-shaped arches and three central cambered niches. Left side arch leads into a small chamber and right side arch into an even smaller chamber. One of a series of garden buildings in the grounds of Ingress Abbey (qv). Listing NGR: TQ5897275037