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.
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.