This image features a colorized photo of Cumberland Falls, the most prominent feature of the larger Cumberland Falls State Resort Park.
The description states:
Glorious sunrises and colorful sunbows are common sights at Cumberland Falls, where on moonlit nights may also be seen the “moonbow,” an attraction shared only with Victoria Fall in Africa.
–This falls is sometimes compared to the larger and more famous Niagara Falls on the border of the United States and Canada. This postcard dates from the 1940s.