Innerkip Quarry is a spring-fed freshwater dive with a shallow shoreline setup, multiple submerged attractions and a long track record as a beginner-friendly Ontario site. The quarry mixes planes, boats, buses, cars and a sunken mine shaft, so the dive feels like an underwater scavenger hunt rather than a single route. Plan it for spring or early summer if you want the best visibility and the easiest day-use logistics. Expect cold water, simple navigation and plenty of typical Southern Ontario fish.