Found this last night will add some pictures when i get home from work.
Found in Silverwood,
If you go to the bridge where silverwood and sanctum meet, stand on the bridge in the direction of Silverwood and jump off the left side of the bridge into the water. Swim to the shore you will see the rocks go around a bend you can swim through or under that cornor set of rocks and under the world.
I got about 200 yards then fell though the world and ended up being teleported to a graveyard.