This image shows the great width of the canyon even better than its depth. The bottom where the Colorado river flows, is lost in the shadows and obstructing rock formations.
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The description states:
GRAND CANYON NATIONAL PARK, ARIZONA
Varying in width from 4 to 18 miles from rim to rim, Grand Canyon is nearly a mile deep. First discovered by the Spaniards in 1541, it is a visited by thousands of sight-seers yearly.
–Close examination of the photo will show that the promontory in the right foreground is accessible to tourists, and there is a courageous man standing very near the edge.
This image likely dates from the 1960s.