Tsuujun Bridge (National Treasure Aqueduct)
Japan's only stone arch aqueduct, hand-built in 1854 by villagers to bring water across a valley to drought-stricken farmland. During scheduled releases, water jets horizontally from the bridge's sides in a spectacle unchanged for 170 years.
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Japan's only stone aqueduct bridge that doubles as a flood control mechanism — when the reservoir behind the bridge is full, excess water shoots dramatically from the upper arches over the road below. The stone arch bridge itself is a masterpiece of Edo-era engineering (1854). Surrounded by terraced rice fields and forested valley — one of Kyushu's finest rural landscapes.
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