Strait of Canso
The Canso Causeway was built at a narrow location on the Strait of Canso, about northwest of Port Hawkesbury and Mulgrave, crossing from Cape Porcupine near Auld's Cove on the Nova Scotia side to Port Hastings on the Cape Breton side. About of rock for building the causeway was quarried from a mountain on Cape Porcupine.