The major tourist destination Lake Havasu is a reservoir constructed a big pumping station indicates the start of the Central Arizona Project (CAP).  This 336 mi (541 km) long diversion canal moves water from the Colorado River to central and southern Arizona. The CAP is the largest and most expensive aqueduct system ever constructed in the United States, and it is the single biggest consumer of energy in Arizona. Without it Phoenix would not have been able to grow to its current size of 1,5 million residents.

Photos: Ronald de Hommel / Johannes Abeling