Tower of Deathless Feathers (Aaru)
A treasure location and a fast travel point in Aaru. Senu can locate the treasure in a small hut by the base of one tower.
Loot the white chest inside to complete the location.
Do remember to claim the fast-travel point here. You can also search that same tower point for a cryptic message from the ba-birds.
The tower shadow also plays a part in the local stelae riddle.