Le Grand Canyon et la rivière Colorado en 3D

The Colorado River & Grand Canyon in QTVR Full Screen: "The Grand Canyon is one of the seven natural wonders of the world. The park covers 1,904 sq. miles (4,950 sq. km) in northern Arizona; it is 277 miles long (446 km) and is cut by the Colorado River. The gorge is a mile deep (1.6 km) and 18 miles wide (29 km) in some places."