One of UNESCO’s World Heritage Sites, Cockatoo Island is the largest island located across the Sydney Harbour, at the junction of Parramatta and Lane Cove Rivers. A short ferry ride from Circular Quay, Cockatoo Island is not just fun for a day out in Sydney, but also educational as it possesses an extraordinary history worth exploring. In 1839, Cockatoo Island was built as a prison for dangerous convicts, and in WWII it became a ship yard. The island wasn’t functioned through the 1990s, before it was restored in 2001, and opened for public in 2007. The island is also listed among UNESCO’s World Heritage Sites.