The Giant's Cave is a curving tunnel, cut into the rock-face through which Piercefield walk passes via a large opening on the southern side and a smaller rectangular portal on the northern side. The cave comprises a main chamber, partially natural, with subsidiary chambers to the east. At the southern entrance is a bastion defined by low walling. Contemporary descriptions refer to the statue of a giant above one of the entrances but this no longer survives.
Source: Cadw scheduling description of 08. 2000 F.Foster/RCAHMW 03. 2006