Prepare to be mesmerized by the otherworldly beauty of Okama, a stunning crater lake nestled at the summit of the Zao mountains. Known locally as the 'Five-Color Pond,' the water shifts between shades of emerald and turquoise depending on the light, creating a truly magical sight. You can drive most of the way up via the scenic Zao Echo Line; from the nearest car park, it's just a short 5-to-10-minute walk to the main viewpoint, making this incredible natural wonder surprisingly accessible.