Prompt
"Generate an image of a breathtaking landscape featuring the tallest sand dunes in North America, set against a backdrop of the Sangre de Cristo Mountains at Great Sand Dunes National Park and Preserve in Colorado, United States. The image should capture the vast expanse of the dunes, with Medano Creek flowing through the foreground and a clear blue sky above, highlighting the unique ecosystem of grasslands, alpine tundra, and wetlands. Incorporate a few hikers in the distance to provide a sense of scale and recreational activity, such as hiking and sandboarding. The style should be realistic and evoke a sense of natural wonder and serenity."