Prince of Wales Fort National Historic Site of Canada is a ruinous early 18th-century fur trade fortress built by the HudsonÕs Bay Company. Surviving stone walls stand starkly silhouetted on the tundra along the shore of HudsonÕs Bay at the mouth of the Churchill River in northern Manitoba. The designation refers to the remains of the fort on its point of land, Sloop Cove - historically the HudsonÕs Bay CompanyÕs winter harbour - and Cape Merry - a defensive battery situated on a point of land across the Churchill River opposite the fort.