Oluwa Idols are idols of Ída, Okú and Mimo Abosi, the three Oluwa spirits of Yaran folk faith. They tie into the Yaran Story Triada Blessings, so they are worth chasing for the Triador Supremo.
Look for the Triada Relic Treasure Hunts: Ída's, Okú's and Mimo Abosi's. Each one leads to an idol, and they are split across Madrugada, Valle De Oro and El Este.
Bringing the idols back completes Triada Blessings. That story is how you get the Triador Supremo and the Amigo Oluso, and it unlocks Undying Tradition.
Image: UbisoftCriptograma Charts
Criptograma Charts are the coded symbol sheets that open Criptograma Chests. Every chest needs two of its own, so you hunt down 30 charts in all to empty the 15 chests on Yara.
Image: UbisoftCriptograma Chests
Criptograma Chests are locked guerrilla stashes of unique gear hidden near Yara's guerrilla paths. You open each one with two Criptograma Charts found nearby, and all 15 unlock That's Puzzling.
Image: UbisoftFND Caches
FND Caches are military supply boxes stashed at FND sites. They are one of your main sources of gunpowder, which you spend on weapon upgrades at the Workbench.
Image: UbisoftJewelry Boxes
Jewelry Boxes are small hidden caches that hold cosmetics such as charms, spray paint for your weapons and vehicle attachments. Grab them if you like customising Dani's gear.