The Castlepark peninsula in Kinsale harbour on the coast of County Cork, on the south coast of Ireland is really more a presque-isle than a peninsula, being joined to the mainland only by an extremely narrow neck at its north-western corner. Thus, the Castlepark peninsula is almost surrounded by water: the River Bandon, flowing from the north-west, bounds the peninsula on the north; the entrance to Kinsale harbour bounds the peninsula on the east; the Atlantic ocean bounds it to the south; and the tidal inlet known as Sandycove Creek bounds the peninsula on the west.