St. Peters Canal National Historic Site Community of St. Peters. St. Peters Canal is an 800 metre canal linking the Atlantic Ocean with Bras d'Or Lake. Work started on the canal in 1854 and was completed in 1869. The canal also boasts the only functioning lock system in Nova Scotia. View interpretive exhibits, enjoy a picnic lunch, or experience the canal by pleasure craft. City of Sydney to Canso Causeway & Trans Canada Highway #105 Portions of this highway follows the Bras d'Or Lakes scenic drive trailway and the Fleur-de-Lis Scenic Drive Trailways connecting with the Trans Canada Highway at the Canso Causeway.