The Twilight Grove sits in the middle of Duskwood. It has a surprisingly night elven feel to it, and could very well be sitting dead in the middle of Ashenvale as opposed to in the middle of human lands. It is home to one of the four portals to the Emerald Dream guarded by the green dragons of Ysera's dragonflight. Though the portal is currently closed, many wonder what lies beyond.
The other three portals are in Feralas, The Hinterlands, and Ashenvale.