Fastnet Rock is a small island located off the southern coast of Ireland. It is known for its iconic lighthouse, which was built in 1854 and stands 49 meters tall. The rock is part of the Fastnet Lighthouse complex and serves as a crucial navigation point for ships traveling through the Celtic Sea. The area around Fastnet Rock is rich in marine life and is often visited by birdwatchers and nature enthusiasts. It is also famous for the Fastnet Race, a prestigious sailing event that starts in Cowes, England, and ends at the rock, attracting sailors from around the world.