Tucked within the quiet town of Minamiaso in Kumamoto Prefecture lies a sacred pool of impossibly clear water: Shirakawa Suigen. This isn’t just a pretty pond. It’s the literal birthplace of the Shirakawa River, one of the major water sources for the entire region. What makes it truly special isn’t just the water’s purity—but the sense that you’ve stumbled upon something quietly magical.

From above, Pulau Bungin resembles a jigsaw puzzle of rooftops tightly packed into the sea. No trees. No open fields. Just houses—hundreds of them—squeezed together so tightly that even alleyways feel like afterthoughts. Welcome to one of the most densely populated islands in the world, hiding quietly in the lesser-traveled waters of Indonesia.