The Saint Lawrence river in Cardinal is home to two sunken ships which are popular dive sites for tourists and locals. Both shipwrecks are also visible from land, as the water is shallow enough that both ships are partially exposed above the water. was an iron-clad, wooden steam freighter built in Cleveland in the 19th century, and launched on July 6, 1878. The ship was around in length with a speed of . "Conestoga" was awaiting passage through lock 28 at the Galop Canal on May 22, 1922, when a fire broke out in the engine room. All passengers managed to escape and the ship's cargo was also salvaged, however the ship itself was flushed downstream from the locks where it eventually sank about from the shoreline. "Conestoga" rests at a depth of only , with the top portion of the steeple engine protruding above the river. According to divers, the wooden portions of the "Conestoga" site are well preserved, however the top portions of metal are badly ice-damaged and rusted, and are quickly deteriorating. Looters and "wreck-stripping" has apparently caused significant damage to the site, and a blade from "Conestoga"s propeller was broken off by a dynamite blast during a salvage attempt gone wrong.