Old Bow And Old Ham Mines (grid reference SO579088) is a 40.3-hectare (100-acre) biological Site of Special Scientific Interest in Gloucestershire, notified in 1998.

[1][2] The mines comprise one of a series of Sites of Special Scientific Interest within the Forest of Dean and Wye Valley (Gloucestershire and Monmouthshire).

These provide excellent hibernation sites for bats and the Old Bow and Old Ham mines are made up of a far-reaching area of underground workings.

[1] The Horseshoe bats hibernate in the caves and tunnels in the winter months and move between various parts of the mine complexes in spring and autumn.

Natural pigments such as ochre are mined by the mineral gale owner along with small quantities of iron ore and rock samples.