The Iona Bridge at Grand Narrows is one of the most popular dive sites in Cape Breton and a must to see when you are a diver. Easy access from shore, the dive will take you through the piles of an old train bridge in just 5m of water, before you drop down to sandy bottom on 15m.
You follow the 80m long iron barge, that sits in an upright position on sandy bottom. With a maximum depth of 21m, the main structure of the barge starts in just 12m of water.
Giving it's geographical layout ( bottleneck ), the dive site is subject to very strong currents. Getting two dives in slack tide requires some calculation, but it is worth the planning. Due to the strong current, this dive site is a heaven for filter feeders and all kinds of fish. There is rarely a dive site in Nova Scotia, where you can see more marine life.