If luck isn't going your way, and you don't want to leave the island without seeing the wildlife, try Parndana Wildlife Park. You'll be able to walk amongst the animals and have the kangaroos crowd around you while you feed them.
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Sandboards and toboggans are available for rent
Australian sea lions are at Seal Bay Conservation Park. Located in the south of the island, this park gives you the opportunity to see wild Australian sea lions resting on the beach before returning for feeding in the sea. You can take an unguided walk along the boardwalk and to the lookout at any time. The beach is only accessible with guided tours.
A nice set of caves. Probably nothing here of particular interest if you have visited limestone caves in the past.
Scuba tank refills.
The site of the first settlement in South Australia. The lookout is nice, and there is a mulberry tree first planted as part of a farm here during early settlement. Other interpretive signs pointing out the history of the area, and where things were. You will need a good imagination to bring it back to life though. Nice view over Kingscote.
also known as Mt Thisby
Matthew Flinders first ascended the peak, and it will take about 10 minutes to climb if you are of reasonable fitness. Steps the whole way, and a 360-degree view from the top. Whilst you're here, don't miss Pennington Bay.