... as seen from Cape-Clear - the southernmost island in Ireland.
Fastnet Rock, is a small islet in the Atlantic Ocean and the most southerly point of Ireland. It lies 6.5 km (4.0 mi) southwest of Cape Clear Island and 13 km (8.1 mi) from County Cork on the Irish mainland.
Due to its location, Fastnet is known as "Ireland's Teardrop", because it was the last part of Ireland that 19th century Irish emigrants saw as they sailed to North America.
It is a small clay-slate islet with quartz veins. It rises to about 30 metres (98 ft) above low water mark and is separated from the much smaller southern Little Fastnet by a 10 metres (33 ft) wide channel.
Fastnet also gives its name to the sea area used by the Shipping Forecasts on BBC's Radio 4.
The current lighthouse is the second to be built on the rock and is the highest in Ireland.
Fastnet Rock is used as the midpoint of one of the world's classic offshore yachting races, the Fastnet Race, a 1,126 kilometres (700 mi) round trip from Cowes on the Isle of Wight, round the rock and back to Plymouth.
Reference: Wikipedia