A two hours drive from Adelaide and you will find yourself in the peaceful Yorke Peninsula. To the west and overlooking Spencer Gulf are lovely coastal towns with secluded bays for swimming and perfect shallow reefs for snorkeling. Beautiful beaches dot the coastline down to the tip of the peninsula at Innes National Park which offers not only great views over the gulf but great camping as well.
Also, one of the best diving experiences can be had at Wardang Island which forms a breakwater for the western coast and is reached easiest from nearby Point Victoria. There are nine shipwrecks off her shores which make for a full days exploring. Sacred to the local Narunga Aboriginal people, you will need to obtain a permit to visit the island and being that you need to register your dive trip here it doubles as a safety precaution.
The Flinders Ranges are endless folds and crumples of mountains and escarpments with a very close tie to the Aboriginal Dreamtime. Find out about Akurra, a massive serpent that guards the waterholes and was responsible for the formation of the contours and grooves as it wriggled through this land.