St. Martins Well is located in Well Lane and is also known more in modern times as Pipe Well. Some argue that this well is the probable reason for building a settlement at Liskeard. Its first written mention dates from the 14th century and is referred to in old documents as "The Well of Lyskiret " or "The Well of St Martins".
The water of the well is fed by four springs and apparently has never been known to run dry. Like most Cornish wells, it is meant to bring luck in matrimony and it was also believed to possess miraculous healing powers and would cure "weak eyes".
For further information, please read Haunted Britain by Antony D. Hippisley Coxe.