
Brow Head Signal Tower stands on the southernmost point of mainland Ireland near Barleycove in County Cork. Built in 1804 as part of a defensive network during the Napoleonic Wars, the tower was one of 81 signal towers constructed around Ireland's coast to detect and warn of French invasion using flags and balls on a mast. Located strategically on high, exposed terrain with inter-visibility with neighboring towers, Brow Head also features a Marconi Telegraph Station and remnants of 19th-century copper mines, making it a significant site of both military and industrial heritage.