From Fremantle: Rottnest Island Ferry & Bus Day Tour

Enjoy a full-day adventure to Rottnest Island with ferry transfers from, a 90 minute discovery bus tour, and free time to explore. 
Join the ferry at Fremantle for a 25-minute ride to Rottnest Island. 
Then embark on a 1.5-hour discovery morning or afternoon bus tour where you will circumnavigate the whole Island and see all of its great sites and views. Relax on the air-conditioned bus and enjoy the beauty and splendor of Rottnest Island's natural landscape.
The passionate and knowledgeable guides will share with you all the best stories about the Island. It has a rich cultural and social history and you will get their expert interpretation. 
After your tour, you have free time on the island to explore independently. You could perhaps rent a bike (at your own cost) or go swimming off one of the white-sand beaches before catching the return ferry back to Fremantle.