Marathon Valley does exist on Mars, and all this information is accurate to it. Gemini even correctly names it. They're just all too polite to correct the user.

Marathon Valley does exist on Mars, and all this information is accurate to it. Gemini even correctly names it. They're just all too polite to correct the user. https://science.nasa.gov/resource/opportunitys-panorama-of-marathon-valley/ https://science.nasa.gov/resource/opportunitys-panorama-of-m...