America's 58 National Parks

Canyons: Black Canyon River (1x18)

Data di messa in onda: Feb 20, 2013

Black Canyon of the Gunnison National Park is a United States National Park located in western Colorado. The Black Canyon is so named on account of its steepness which makes it difficult for sunlight to penetrate very far down the canyon. As a result, the canyon walls are most often in shadow, causing the rocky walls to appear black.