The town lies on the Lan River (Lanjiang), a tributary of the Fuchun River, both north-flowing; the Fuchun River empties into Hangzhou Bay.
The Longyou Caves are a series of large artificial caverns located at Phoenix Hill, near the village of Shiyan Beicun on the Lan River in Longyou County, Quzhou prefecture, Zhejiang province, China.
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