Picture a grand fantasy map, meticulously illustrated on an ancient-looking parchment. Dominating the map is a massive continent, at the heart of which lies a sprawling river traversing through a large, fertile plain. This central feature hints at the presence of a magnificent city, though it remains unnamed and unmarked. The rest of the continent is a silent testimony to geographical diversity, with various unnamed terrains like desolate deserts, mist-shrouded valleys, and foreboding mountain ranges, all depicted without the use of any text or markers, creating a pure and undisturbed visual experience.