I can confirm what Hessah said. Yes the quests SAY Swamp of Dawn, but they are actually in Sand Hill. And also, yes there is a new map called Swamp of Dawn and it is below Burning Rock.

When my archer turned level 31, it also received a quest for the swamp of dawn. I can also confirm that this is actually sand hill. It's the night attack quest in which you have to kill 40 desert archons.