The granite on Georgian Bay is the oldest stone of the world, more than 3.96 billion years old. Zhiishiib Rock, is one of the special pieces of the Canadian Shield, located just at the north end of Parry Sound, the rock is beautifully silhouetted by the setting sun. To explore Zhiishiib Rock yourself, the North Shore Rugged Hiking Trail will take you right along side it, and give you great views of the Big Sound.