Imagine a vast and expansive fantasy world map, sketched on parchment paper. At the heart of this map lies a colossal main continent, known as the Tranquil Realms. Its central region is dominated by a wide, meandering river that flows through a fertile plain, nurturing the life of a magnificent, yet unseen, city. Surrounding this central plain, diverse terrains including misty forests, towering mountains, and mysterious marshlands. The map, free of any text or markers, invites the viewer to explore the untold stories and adventures that lie within its borders.