There is a stretch of sea touched by the magic of nature—Jinguashi's "Yin-Yang Sea." As pyrite in the mountains oxidizes, it forms acidic mineral water rich in iron ions that flows into the bay. Upon meeting the deep blue ocean, the two liquids remain distinct rather than blending, creating a surreal, shifting gradient of half golden-yellow and half indigo-blue. Standing on the Shuinandong Observatory and looking out, the abandoned factory complex of the Remains of the 13 Floors hangs over the coast like a castle in the sky. Combined with the otherworldly hues of the Yin-Yang Sea, it feels just like a scene from a science fiction movie. Visiting right after the rain clears is highly recommended; when sunlight pierces through the clouds and pours over the water, the golden-yellow and blue contrast becomes its most vibrant, making it the ultimate golden hour for photographers.