Vintage WPA-style travel poster of Yellowstone National Park, with geyser, hot springs, forests, mountains, and text 'YELLOWSTONE NATIONAL PARK'.

Create a vintage 1940s WPA-style travel poster of Yellowstone National Park in early summer. The design should feature iconic geothermal features like steaming geysers and colorful hot springs, surrounded by lush pine forests and rolling grassy meadows. In the background, include distant rugged mountains under a bright, clear sky with soft clouds. Use flat, stylized shapes with minimal shading, true to WPA graphic art. Apply a subtle screenprint texture and a muted summer color palette: warm ochres, sage greens, soft blues, gentle yellows, and earth tones. Absolutely no animals or people. Place large, bold vintage sans-serif lettering at the top of the poster that reads: ‘YELLOWSTONE NATIONAL PARK’ in all caps, with no white background behind the text so it integrates seamlessly with the image. The lettering should be sharp and styled like classic WPA fonts such as Neutraface or a bold geometric sans-serif. The final image should evoke a sense of serene wilderness, timeless adventure, and 1940s national park poster authenticity. See more