'Valley gate' in the Bible

So I went out during the night through the Valley Gate toward Dragon's Well, and from there to the Dung Gate, inspecting the walls of Jerusalem that were broken down and burned by fire.

I traveled the valley by night to inspect the wall, returning through the Valley Gate.

Hanun and the residents of Zanoah repaired the Valley Gate, reconstructing it and installing its doors, including locks and security bars. They also rebuilt 1,000 cubits of the wall as far as the Dung Gate.