The Panama Canal connects the Atlantic and Pacific oceans through an 82 km man-made waterway across the Isthmus of Panama. It features three sets of locks - Gatun, Miraflores, and Pedro Miguel locks. The locks raise and lower ships up to Gatun Lake, which ships traverse to cross the isthmus. The canal cuts the travel distance between the US West Coast and East Coast in half. It was constructed between 1904-1914 after earlier French attempts failed and has since been expanded to allow larger ships.