Riding the highest tides in the world is a sport found on both sides of the Bay of Fundy in Nova Scotia and New Brunswick. Head to the mouth of the Shubenacadie River, NS, and experience the equivalent of a tidal wave. When the tide changes, millions of gallons of seawater rise up to 3.4 metres and surge nearly 12 kilometres an hour inland — in a mere two hours — creating Class IV rapids. Ride the bore in a five-metre Zodiac with guides from Tidal Bore Rafting Park (tel: 800-565-7238; tidalboreraftingpark.com).
In New Brunswick, Bay of Fundy tides meet the Saint John River — as the tides begin to rise they become higher than the river level and eventually the river begins to flow upstream; this phenomenon is called the reversing falls. In Fallsview Park in Saint John, you can leap, surf and climb the resulting rapids on a Reversing Falls Jet Boat Rides (tel: 888-634-8987; jetboatrides.com). Expect to get doused.