Garinish[1] or Garnish Island (Irish: Garinis)[1] (also known as Ilnacullin) is an island in Glengarriff Bay, an inlet of Bantry Bay, near the shore of the Beara Peninsula in County Cork, Ireland.

The garden was designed by Harold Peto, (1854–1933), for its owner John Annan Bryce, (1841–1923), a Belfast native, who purchased the island from the War Office in 1910.

[citation needed] There is a restored Martello tower on the island dating from the time of the Napoleonic Wars.

[citation needed] Mains electricity was brought to the island in the early 1950s via overhead cable.

[3] The island extends to 15 hectares (37 acres) and is renowned for its gardens which flourish in the mild humid micro-climate of Glengarriff harbour assisted by a mainly pine shelter belt.