The area around Godstone has important stone mines, in the Upper and Lower Greensand beds. Excavation dates back centuries, reputedly to Roman times. The product was used for building, hearthstone and for refractory use. An underground quarry implies extraction of intact blocks, otherwise mine would be more appropriate terminology.
Godstone Hill is one such quarry and has extensive workings around the junction of the M25 and A22. The quarries were re-used for mushroom growing at the beginning of the 20th century. The quarries are well secured and access arrangements are through the Wealden Cave and Mine Society.