Envision a detailed fantasy world map, gracefully etched onto soft parchment. The map showcases a single, large continent, centrally defined by a significant river that cuts through a vast plain, suggesting a natural gathering point for a great, though invisible, city. The surrounding lands of the continent are rich with unnamed and unmarked features such as dark forests, lofty mountains, and expansive grasslands. This map is designed entirely without text or markers, offering a pristine and untouched canvas for the imagination, where stories and adventures await in the silence of its geography.