The Oluwa Cave is at ISLA SANTUARIO - QUITO - VENTURA SUMMIT
East of CLARA'S CAMP
WHAT TO DO
Go into the cave until you see the room with the chests and a note on the floor.
When you read it, 3 Treasure Hunts will be revealed:
You can open the chests...
Do those 3 Treasure Hunts.
Then come back to the cave.
Place the idols in the center and a whole new area opens.
Fight the jaguar and you have Oluso as Amigo.