Glauxilian is the Elven city that lies on the border of the Vampires' territory. This is where all of the Elves live, and is a city made out of the forest itself. The trees here have been formed by many years of natural magic, and homes are built into the trunks of the trees themselves.
The Elves are comfortable living so close to the Vampires only because the trees have been formed to build a natural barrier. There is no way past it unless you go all the way around it or over it, but over a hundred feet upward is a very inconvenient distance to travel. The trip all the way to the Cross Roads and into the Elves' territory isn't worth it either; what Vampire wants to be traveling so long that he risks getting caught in the sunrise?