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In 1958 the St-Lawrence seaway was created. The depth of the seaway was increased to allow larger ships to travel to the Great Lakes. As such many villages, road ways, locks, power houses, canals were submerged and can be seen by divers.

Lock 21 is an exciting and unique dive where you get to go back in time and dive a 19th century submerged Victorian canal lock on the St. Lawrence River. This dive can have strong currents and is best done by experienced divers.

In 1958 the St-Lawrence seaway was created. The depth of the seaway was increased to allow larger ships to travel to the Great Lakes. As such many villages, road ways, locks, power houses, canals were submerged and can be seen by divers.

A great site to dive the historic Locks of the St. Lawrence River. This site is accessible from the Canadian side of the river. A nice dive for beginners as there is no current and the depth is shallow.

This dive site is in the old Canal Soulange (no longer in use). It has an interesting location near Parc des Ancres (where you will find many old ship anchors). The site is shallow with very calm water. As such, it is easy to silt it up so take caution.

The St-Zotique underwater park boasts four wrecks: the Fédéral 11, The Teddy W, The Anne-Marie G, and the Fédéral 4. There are multiple anchors all linked together with cables so divers do not get lost.