Here is a map with all currently known spawn points of the Edge of Reality portal in Shadowmoon Valley.
/way 41.9 75.7 Beach
/way 43.5 71.4 Stairs
|by Nullscript, great screenie showing the view distance!|
|The same portal, but being right in front of it|
/way 46.6 70.0 Elephants
/way 48.7 69.9 Rock
/way 49.7 71.9 Rise
/way 50.3 71.3 Hill
|Another viewpoint by Barringa, Wowhead|
/way 50.7 72.5 Edge
I didn't write down the names of the people who took the screenshots, but feel free to let me know if you want your name added etc. I will also do my best to add names when I find them again. All the ingame pictures are from wowhead.