The Panama Canal is an artificial 82-kilometre waterway in Panama that connects the Atlantic Ocean with the Pacific Ocean, cutting across the Isthmus of Panama, and is a conduit for maritime trade. Canal locks at each end lift ships up to Gatun Lake, an artificial freshwater lake 26 meters above sea level, created by damming up the Chagres River and Lake Alajuela to reduce the amount of excavation work required for the canal, and then lower the ships at the other end.