Rubislaw Quarry was opened in 1740 and is located at the Hill of Rubislaw in the west end of the Scottish city of Aberdeen. In 1778, Aberdeen city council sold it to a businessman, as it was not thought to be a source of good building material. However, over the next 200 years, an estimated six million tonnes of granite were excavated from the quarry, giving Aberdeen the name of 'The Granite City'. Rubislaw Quarry is the biggest man-made hole in Europe.