You can enter or leave Zaralek Cavern through flight paths in Patch 10.1.
While we previously thought the new Patch 10.1 can only be entered using the 3 entrances located in the Dragon Isles, it’s fortunately not the case. When you discover flight paths in the zone, you can talk to any Dragon Isles Flight Master who will fly you to Zaralek Cavern.
Talk to any Flight Master to open up the Flight Map.
In the bottom right corner, select Zaralek Cavern.
The zone map will appear, along with all discovered flight paths.
This one was discovered by MrGM on the 10.1 PTR.
