Purvishill Tower was a peel tower in the 16th century however by the mid-19th century it had been demolished and all that is now visible is a stony mound.

It was one of a series of towers along the Tweed valley, each of which was visible from the next. Elibank would signal to Holylee, Holylee to Scrogbank, Scrogbank to Caberston, Caberston to Bold, Bold to Purvishill and then on to a continuing chain from Innerleithen to the north-west.

The signal would then pass along to Traquair, Grieston, Ormiston, Cardrona, Nether Horsburgh, Horsbrugh, Haystoun, Peebles and on to Neidpath. From Neidpath it would continue to Caverhill, Barns, Lyne, Easter Happrew, Easter Dawyck, Hillhouse, West Dawyck, Dreva and on to Tinnis.