Culebra Cut

The Culebra Cut, formerly called Gaillard Cut, is an artificial valley that cuts through the Continental Divide in Panama. The cut forms part of the Panama Canal, linking Gatun Lake, and thereby the Atlantic Ocean, to the Gulf of Panama and hence the Pacific Ocean. It is 7.8 miles (12.6 km) from the Pedro Miguel lock on the Pacific side to the Chagres River arm of Lake Gatun, with a water level 85 feet (26 m) above sea level.

• http://en.wikipedia.org/wiki/Culebra Cut