Rottnest Island is a former prison island that is about 19km or 12 miles from Perth, Australia. Noted as one of the biggest dive sites in Australia it has over 100 different sub dive sites within it. There is a great array of limestone over hangings, various wrecks and even a sunken grotto which can be found in the Fishhook Bay area. There are no cars allowed on the island so you will need to rent cycles to get around. You will also need to rent all of your diving gear which is available from one of the many stores on the island. A visitor map will suggest to you a range of trails to ride on that will lead you from one dive site to another. Your private sea garden is just a quick journey away and you will easily see why Rottnest Island is such a tempting place to visit since it has so much to offer.