Valley of the Abyss?
Hearing this name, Benjamin slowly remembered, before this, he saw something like this in a book.
It is a valley at the borderlands of Ferelden, the surface wasn't big but it was famous, like the Bermuda Triangle. Choosing "Abyss" to name the valley was not because of any magical creatures, but to many people, there was a strange power there.
There weren't many magical creatures in here, so in the beginning, many people still travelled through this place. But soon, people were starting to notice that the rate of people who took this route and going missing was too high.