|Cyclist in front of Remarkable Rocks (photo courtesy of Champion United)|
The island has numerous wildlife protection areas, with the largest and best known being the Flinders National Park. It was established as a wildlife conservation area in 1919 to protect endangered species. After its establishment, some native mainland Australia species were brought to the island. These include the duck billed platypus and the koala. The park also has some interesting geological formations, such as Remarkable Rocks in the photo above.
For a personal account of cycle touring Kangaroo Island, please visit Mike & Judith's Tour of Kangaroo Island. In 2008 they spent two weeks traveling from Perth to the island and cycling around. Here's a Lonely Planet video that shows some of the island's wildlife: