Skellig Michael, also called Great Skellig, is a twin-pinnacled crag 11.6 kilometres west of the Iveragh Peninsula in County Kerry, Ireland. The island is named after the archangel Michael, with "Skellig" derived from the Irish language word sceilig, meaning a splinter of stone. Its twin island, Little Skellig, is smaller and inaccessible. The two islands rose c. 374–360 million years ago during a period of mountain formation, along with the MacGillycuddy's Reeks mountain range. Later, they were separated from the mainland by rising water levels.
Skellig Michael consists of approximately 22 hectares of rock, with its highest point, known as the Spit, 218 m above sea level. The island is defined by its twin peaks and intervening valley, which make its landscape steep and inhospitable.
Wikipedia https://en.wikipedia.org/wiki/Sceilg_Mhichíl
Coordinates 51°46'19.03" N -10°32'19.854" E