The Big Sound is the reason that Parry Sound exists. As the deepest natural freshwater harbor in the world, the Big Sound is a large lake in itself. When the wind and waves are building up, the storms to be seen in the area are legendary. The dark, churning waters are legendary and have taken down many a ship. While dangerous to be on, watching the water during one of these squalls is one of the great joys of living on Georgian Bay.