St Lawrence Seaway

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This system of locks, canals and dams that opened in 1959 along the St Lawrence River enables oceangoing vessels to sail 3200km inland via the Great Lakes. Across Pont Victoria from the city is an observation tower over the first locks of the system, the St Lambert Locks, where ships are raised/lowered 5m.

From January to March, the locks are closed - they're frozen like the river itself until the spring thaw. The site can be reached by the bike trail on the south shore of the St Lawrence, about 300m southwest of the Pont Jacques-Cartier.