Hidden beneath the streets of Tokyo lies an engineering marvel known as the “Underground Temple.” This massive underground complex, officially called the Metropolitan Area Outer Underground Discharge Channel, plays a crucial role in protecting Tokyo from devastating floods. With its towering columns and vast chambers, this facility can store and redirect excess water from typhoons and heavy rains, safeguarding the city’s 37 million residents. A true testament to Japan's ingenuity, the Underground Temple stands as a silent guardian against nature's fury.