这是一个很深的坑，海拔-87米，位于松江区天马山旁边。很久以前应该是个采石场之类的地方吧，里面没有排水设施，所以两年前还是一个湖，现在要在里面造瀑布和酒店，于是把水抽干了~~

This is a very deep pit, the depth is 87m. It’s located by Tianma mountain, Songjiang district. Maybe it’s kind of a quarry long ago. For there’s no drainage there, it’s been a lake for a long time. Recently they pump the water out to build a 5-star hotel in it.

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Shanghai Tours, Songjiang