Dhan Uisge (Gaylet Pot): Dhan Uisge (Rubislaw Quarry)

Calum Maclean explores the deep waters of Rubislaw Quarry, hidden away in the centre of Aberdeen. The quarry opened in 1740 and about six million tons of granite have been extracted from it. With a depth of 140 metres, this has been said to be the largest hole in the ground in Europe