Located just 11 miles 18km off the coast of perths rottnest island is widely regarded as one of western australias most beautiful islands with its stunning coral reefs crystal clear waters and unique wildlife hop on a high speed ferry from hillarys boat harbour and enjoy free time to explore the rottnests pristine bays and secluded beaches some of the finest in the world and the islands unique architecture at your leisure before returning to hillarys boat harbour in the afternoon