Ailsa Craig is a small, uninhabited island located in the Firth of Clyde off the west coast of Scotland. It is approximately 2.5 miles long and 1.5 miles wide, rising to a height of 338 meters. The island is known for its distinctive round shape and steep cliffs, making it a prominent landmark in the area. The island is primarily composed of granite and is famous for its unique geology. It is also home to a variety of seabirds, including gannets and puffins, making it a popular spot for birdwatching. Ailsa Craig is a designated nature reserve and is often visited by boat tours.