Mother Ludlam's Cave

Mother Ludlam's Cave—also known as Mother Ludlum's Cave or Mother Ludlum's Hole—is a small sandstone cave located in the Wey Valley at Moor Park, near Farnham in Surrey, England. The site is surrounded by local legends and folklore. A natural spring emerges from within the cave and was first recorded in the 13th-century Annals of Waverley Abbey, where it was referred to as "Ludewell." Over the centuries, the name has appeared in various forms, including "Ludwell" and "Luddwelle."

In 1218, a monk named Symon identified the spring as a new water source for Waverley Abbey after the monastery’s original supply had failed. The monks dedicated the spring to St Mary, giving rise to the alternate name "St Mary's Well." Although the cave was formed naturally by the spring, it may have been enlarged by the monks and later reshaped into a grotto, likely in the eighteenth century. An arched ironstone entrance, possibly added during Queen Victoria's reign, further embellished the site.

The cave was first surveyed in 1945 and measured approximately 200 feet in length. A later survey in 1961 recorded the length as 192 feet up to a roof collapse that had occurred within.