Cockatoo Island is a UNESCO World Heritage Site located in Sydney Harbour, Australia. It is known for its rich history, having served as a convict penal establishment in the 19th century and later as a shipyard. The island features well-preserved industrial buildings and convict-era structures, making it a significant site for both history and architecture. Today, Cockatoo Island is a popular destination for visitors, offering guided tours, camping, and various cultural events. The island is accessible by ferry and provides stunning views of the Sydney skyline and surrounding waters, making it a perfect spot for relaxation and exploration.