Prompt
"Generate an image of a serene and majestic river flowing through a scenic landscape, surrounded by lush greenery and rocky cliffs. The Yellowstone River, a 692-mile-long river in the United States, is depicted in a realistic style, showcasing its tranquil waters and picturesque surroundings, with a few birds flying overhead and a glimpse of a waterfall in the distance, highlighting its notable features as the longest undammed river in the contiguous United States and a popular spot for fishing, rafting, and wildlife watching."