The Carmel Head Daymarks mark the northwestern tip of Anglesey and warn of hazards offshore.
Established in the 1860s, the daymarks line up with the West Mouse marker, indicating the dangerous reef of Coal Rock, beyond West Mouse.
The headland at Carmel Head was an important landfall for sailing ships. It formed part of the telegraph system relaying messages along the North Wales coast back to the merchants of Liverpool.
Offshore are the Skerries, with its Lighthouse, and east of the Skerries are three further islands; West Mouse, Middle Mouse and East Mouse.
West Mouse has a large white painted daymark, and when lined up with the two Carmel Head daymarks are known as the “Three White Ladies”.
The area is designated a Site of Special Scientific Interest, and the ruins of a former copper mine and factory are still in existence. The Anglesey Coastal Path passes the marks, and much of the headland is owned by the National Trust, though some areas are restricted during the pheasant shooting season. There is a walk from Cemlyn Bay to Carmel Head.