You may see this green datacron glowing up on a ledge, but you will need to find a different path to reach it.
Taxi / Quicktravel
[HEROIC 2+] Shadow Spawn is closer than the taxi or quick travel.
Walk to Lord Grathan’s Estate
Pass through the wall and cross the long bridge.
After crossing the bridge, follow the brown path on the right into Lord Grathan’s Estate.
Follow the main path. When you enter the main part of Grathan’s estate and there’s a fork in the path, take the metal-paved walkway on the right.
Find the Secret Path
Follow the metal-paved walkway until it comes to an end and turns into a dirt path again.
Near where the path ends, there will be a building to the left and a black wall to the right. Sneak in to the gap between the mansion and the wall and you will be in a grassy area. In the grassy area there will be a secret path opening up in the mountains.