At Diamond Hill on the Blackrock Road is a structure known as the `McCarthy Monument`. The Monument was erected by Mr. Alexander McCarthy who was an MP in the 1860's. It is made of limestone and is 25 feet high. McCarthy built this Monument to honour his ancient forefathers. Many of the decorations on the Monument have been destroyed over the years but if you look closely you can still see the crest of the McCarthy family, a red deer, and the heads of four of the great Kings of Munster, to whom the McCarthys can trace their ancestry.