This image, taken when the sun is fairly low in the sky, shows both the dramatic erosion common throughout the canyon but also the depth of the features visible from the tourists’ vantage point at the top of the south rim’s edge.
The description states:
GRAND CANYON NATIONAL PARK, ARIZONA
The long shadows of evening accentuate the stupendous size of the ridges and chasms keep in the gorge at Grand Canyon. Easily accessible by rail, plane, and modern paved highways, Grand Canyon has become one of the most popular scenic attractions in the West.
–This card likely dates from the 1960s.