All Alik’r Desert solo dungeons have been remodeled and polished. This is also the case with the Santaki dungeon. The Santaki shard is now located inside a small side room in the southeastern part. Once you enter it, keep going to your right and soon enough you’ll end up in this area.
You’ll recognize the entrance to Santaki dungeon by all the caravan wreckage scattered around nearby.
Santaki dungeon entrance location shown on the map.
Several steps away from a Steam Pipe that gives additional loot.
Santaki map location of the collectible.