Baihelian

A natural stone ridge lies in the Yangtze a kilometre above the mouth of the Wu River. Tang craftsmen cut fish into it and later generations cut text recording how high the fish stood above the water in each dry season, so that the ridge reads as a hydrological station a thousand years long. The reservoir raised the river over it for good once the works began in 2003. Since 2009 visitors have gone down a 91-metre escalator to a gallery where twenty-three round windows look out at the carvings through still water.