This image shows the spectacular view of Tower Falls, an easily accessible feature located in Yellowstone National Park in Wyoming.
The caption states simply:
Tower Falls near Tower Junction in Yellowstone Park.
The falls are 132 feet in height. Most notable is the boulder shown at the edge of the precipice. It is no longer there, having succumbed to erosion and gravity in 1986.
This image likely dates from the 1940s.