Stock photography, photos: Passing thru the Panama Canal Stock photos of Ships passing thru the Miraflores Locks, Panama Canal. The mules that seem to be towing them are actually helping center them in the middle of the lock. They are powered by their own engines. Photograph: © Humberto Olarte Cupas Click for a larger image and more information Keywords associated with this stock photo: canal, commerce, business, currency, government, institutional, institution, authorities, authority, NugPanHoc, panama, south, latin, central, americas, america, tropical, tropic, caribbean, policy, politics, politic, governing, govern, states, state, legislative, legislation, palace, lawmaking, law, money, transaction, locks, lock, waterway, passageway, passage, channel, ship, vessel, transport, embark, boat, vehicle, voyage, downstream, upstream, sailing, sail, boating, vessels, clipper, barques, barque, watercourse, mule, tow, cable, pull, center, stabilize, locomotive, locomotor, electric