Hopi Point, Grand Canyon, Circa 1955
In this photo gallery, get a "then and now" look at three iconic national parks—Grand Canyon, Yellowstone, and Biscayne—and see what changes time has wrought.
Here, visitors gather at Hopi Point, a promontory that affords views of the Grand Canyon 45 miles (72 kilometers) eastward and westward. At the time of the photograph, the Colorado River still made its natural run through the canyon. In the 1960s the Glen Canyon Dam diverted the river’s flows for power production and the growing West’s thirsty communities.