TREASURE CHEST 1

All treasure chests require the lock pick to open. Once you have acquired it, fast travel back to the Kuwaq Yaku or Jungle Cliffs Base Camp. Swim around to the left side of monolith #1, on the east side of the river. Then swim down below the surface, pry away the wooden barrier, and swim into the cave with the treasure chest. Inside the chest is an Artifact, Copal, from the Story A Community in Need. Apparently it smells wonderful, though I'm not sure how Lara can tell underwater. The walkthrough includes additional details and screenshots. (Click screenshots to enlarge.)

RELIC 2 - Burial Doll Replica (Fortune and Glory)

This relic is in one of the buildings on the west side of the village. From the Kuwaq Yaku Base Camp, head north across the metal footbridge into the village, then bear left (northwest). Just before the Community Gardens house, with the blue and red porch railings, make a U-turn to the left, toward the stream with the small dock and oil pipeline running above. The house nearest the stream has a room built onto the back. Pry open the metal door with the Porvenir logo and go inside to find the relic. (Click image for more and larger screenshots.)

RELIC 4 - Promotional Toy (Fortune and Glory)

This relic is on the path to the Hunting Grounds north of the village. From the Hunting Grounds Base Camp, head up the slope to the northwest. Then turn right and follow the path to the north. The relic is on the first wooden platform on the right side of the path. To reach it, continue into the Hunting Grounds. Climb onto the big rock on the right, use a rope arrow to reach the nearest platform, then run another rope line down to the platform with the relic. (Click image for more and larger screenshots.)

DOCUMENT 1 - Company Town (Fortune and Glory)

The first document is sitting on an empty oil barrel between the Kuwaq Yaku base camp and the stairs leading up to Abby's bar. (Click screenshot to enlarge.)

DOCUMENT 3 - Family Tree (A Community in Need)

Follow the directions for document #2, above. The third document can be found inside that same green house. (Click screenshot to enlarge.)

DOCUMENT 5 - A Haunting (Myth, Magic & Monsters )

This document is also in the village proper. Climb the steps leading up to the MARKETPLACE in the north-central part of town, but before entering the building, look to the left to spot the document sitting on a wooden table. (Click image for more and larger screenshots.)

DOCUMENT 7 - End Times (Trinity)

This document is in the area with the boat dock where you fight the Trinity soldiers on the way to the Temple of Life. If you missed it the first time, fast travel to the Docks Base Camp and head south. The document is sitting off to the right on a table under an awning. (Click screenshot to enlarge.)

DOCUMENT 9 - Site Scrubbed (Trinity)

This document is just up the hill to the north of the Docks Base Camp and document #8. (See screenshot above.) #9 is sitting on a crate behind the parked truck on the right, just before the opening in the metal fence leading to the next area. It's easy to miss the first time through since you're about to head into a fight with some Trinity soldiers, but there shouldn't be any enemies around if you return later. (Click screenshot to enlarge.)

DOCUMENT 11 - Balams (Legends of the Maya)

This document is in the same large room as the Temple of Life Base Camp, which only appears after you've finished the level and moved on. If you fast travel to that camp, you'll find the document on a ledge on the northwest side of the room. From there, you can either continue past the stele and through the flooded cavern to the northeast (watch out for piranhas!) or use the base camp to fast travel away. (Click screenshot to enlarge.)

DOCUMENT 13 - Misdirection (Search for the Hidden City) and DOCUMENT 14 - Operation Update (Trinity)

These documents are in the jungle between the Temple of Life and the overgrown airfield where you fought the Trinity soldiers earlier. If you don't fancy swimming through the piranha-infested cavern again, fast travel to the Airfield Dirt Road Base Camp. (This camp only appears after you complete the level and move on.) Follow the path to the southeast, which loops around to the north. Climb over the wooden wall to the clearing with the crashed plane. Exit that area in the northern corner and continue along the path. Document #14 is on the left just before the abandoned truck.

Document #13 is farther along the path to the north. When you come to an apparent dead end, scramble up the tree and jump down onto the ledge ahead. The document is on the side path to the right. Return to the Airfield Dirt Road camp and fast travel away. (Click images for more and larger screenshots.)

NOTE: If you're coming from the Temple of Light via the flooded cavern with the piranhas, you'll approach these documents from the north instead. Follow the main walkthrough if necessary.

DOCUMENT 16 - Secret Winds (Legends of the Maya) and DOCUMENT 17 - Votan (Metamorphosis)

These documents are in the Howling Caves Challenge Tomb at the northeast end of the Hunting Grounds. If you haven't explored there yet, follow the tomb walkthrough. If you've been through the tomb but missed either document, fast travel to the Petroleum Deposit Base Camp and face south. Document #17 is just ahead in a dead-end alcove, along with survival cache #12. To reach document #16, drop down into the area below the doorway just beyond the campfire. The document is on the ground to the right. When you have everything, climb back up to the base camp and fast travel away. (Click screenshots to enlarge.)

MURAL 2 - Wayta, the Tyrant (Resting Places)

This mural is in its namesake, Wayta the Tyrant's Crypt. Fast travel to the Kuwaq Yaku base camp. Head north across the rusted metal footbridge toward the village. Then jump off the left side of the bridge and follow the river west to the crypt entrance. (screenshot) The mural is in the second room of the ancient building, before the muddy slope leading down to the sarcophagus. Follow the crypt walkthrough if necessary. (Click screenshot to enlarge.)

MURAL 4 - Coniraya (Pantheon of Gods 2)

This mural is between the back (north) entrance to the MARKETPLACE and the temple on the north side of the village. As you exit the market, the mural is on the right under an orange awning. The nearest base camps are the Kuwaq Yaku camp, south of the village, and the Kuwaq Yaku Ruins camp, just down the muddy path to the east of the temple and the mural. (Click screenshot to enlarge.)

MURAL 6 - God of Suicides (Pantheon of Gods 3)

This mural is on the southeast wall of the large room with the Temple of Life Challenge Tomb. This camp only appears after you complete the level and move on. From here, you can either continue through the flooded cavern to the northeast or use the camp to fast travel away.  (Click screenshot to enlarge.)

MURAL 8 - Howling Caves (Trials of the Gods)

This mural is in the Howling Caves Challenge Tomb. If you missed it the first time, fast travel to the Hunting Grounds or Kuwaq Yaku Ruins Base Camp and head north to the Hunting Grounds, then northeast to the tomb entrance. Dive into the pool and continue through the tunnels to the wolf den. (Follow the tomb walkthrough if necessary. As far as I know, the wolves don't respawn.) The mural is on the west wall of the den. To get out, use the rope line and claimable wall to reach the Petroleum Deposit Base Camp, then fast travel away. (Click screenshot to enlarge.)

NOTE: You can also start at the Petroleum Deposit camp and make your way through the tunnels to the mural, but this is not any faster due to the indirect route.

MURAL 10 - Temple of Death (Exodus)

This mural is inside the temple north of the village MARKETPLACE. If you missed it the first time, fast travel to the Kuwaq Yaku Ruins Base Camp and follow the muddy path west to the clearing with the Eagle icon on the in-game map. The temple is here on the right. Go inside and you'll find the mural directly ahead, at the top of the stairs. (Click image for more and larger screenshots.)

MONOLITH 1 (Proficient Quechua)

This monolith is on the east side of the river near the village, about the same distance from the Kuwaq Yaku Base Camp and Jungle Cliffs Base Camp. Deciphering it provides the clue to find survival cache #4, below. (Click screenshot to enlarge.)

MONOLITH 3 (Fluent Quechua)

This monolith is in the Hunting Grounds north of the village. Lara probably won't understand enough Quechua to read it the first time you pass through this area. Later, fast travel to the Kuwaq Yaku Ruins Base Camp, go up the steps to the northeast, and drop down into the Hunting Grounds. You'll find the monolith on a man-made stone platform about halfway along the valley. Deciphering it provides the clue to find survival cache #14, below. (Click screenshot to enlarge.)

SURVIVAL CACHE 2

This cache is buried in the sand a few steps to the east of the Jungle Cliffs Base Camp. The first explorer backpack, hidden nearby, reveals the location of this and other caches on your in-game map. (Click screenshot to enlarge.)

SURVIVAL CACHE 4 (Monolith Riches)

This cache only appears after you've deciphered monolith #1, which requires that Lara be Proficient in the Quechua dialect. Reading the monolith reveals a clue: "Take a deep breath and find me right under another's nose." Swim through the tunnel north of the monolith to find the cache buried on the bottom of the pool near this carved stone head. Check the main walkthrough for details. (Click screenshot to enlarge.)

SURVIVAL CACHE 6

The next cache is buried under the blue-and-tan shack built over the water just northwest of monolith #1. Swim down and around the left side of the wire cage to find it. (Click image for more and larger screenshots.)

SURVIVAL CACHE 8

This cache is just south of the Docks Base Camp. It's buried on the river bottom beneath the middle dock in the area with the three boat docks where you fought the Trinity soldiers earlier. (Click screenshot to enlarge.)

SURVIVAL CACHE 10

This cache is in the flooded cavern with the piranhas, beyond the Temple of Life. If you missed it the first time, you may want to wait until you get the lock pick and return for both the cache and treasure chest #2 at the same time. See the treasure chest notes, above, or follow the walkthrough, which includes screenshots and other details. (Click screenshot to enlarge.)

SURVIVAL CACHE 12

This cache is in the Howling Caves Challenge Tomb, at the northeast end of the Hunting Grounds. If you haven't explored there yet, follow the tomb walkthrough. If you've been through the tomb but missed the cache, fast travel to the Petroleum Deposit Base Camp and face south. The cache is just ahead in a dead-end alcove, along with document #17. (Click screenshot to enlarge.)

SURVIVAL CACHE 14 (Monolith Riches)

This cache only appears after you've deciphered monolith #3, in the Hunting Grounds. It requires Fluent Quechua, so you'll need to return later in the game to read it and obtain the clue: "I lie silent where arrows once flew, guarding a door which will no longer open." From the monolith, head to the east and climb up near the rope-wrapped post. Cross over the fallen tree to the next ledge, where you'll find the cache near a door riddled with arrows. The walkthrough includes more details. (Click screenshot to enlarge.)

EXPLORER BACKPACK 1

Backpacks are not required for 100% completion, but finding them reveals the locations of other collectibles on your in-game map, so they can be useful. This one is sitting on the riverbank just west of the Jungle Cliffs Base Camp. If you haven't discovered that camp yet, start at the Kuwaq Yaku Base Camp and swim to the south end of the river to find the camp and backpack. Examining it reveals the following items on your in-game map: treasure chest #1; survival caches #2, #5, #6, #7, #8, #10, #11, #13; and both crypt entrances. (Click screenshot to enlarge.)

ARCHIVIST MAP 1

Archivist Maps are also not required for 100% completion, but examining them can help you locate other collectibles. This one is inside one of the shacks built on the docks above the river in the village. Fast travel to the Kuwaq Yaku Base Camp. Then cross the wooden docks to the northernmost house—the one with blue-striped siding. Jump from the dock to grab the cloth-draped railing and climb up to find the map inside. Examining it reveals the following items on your in-game map: relic #4; documents #12, #16, and #18; monolith #1; murals #3, #5, #6, #7, #8, #9, and #10. (Click screenshot to enlarge.)

ARCHIVIST MAP 3

The last archivist map is in the caverns beneath the oil rig, on the way to the Temple of Life. Later in the game, you can reach it from the Docks or Temple of Life Base Camp. See document #10, above, for details. The map is on one of the crates in the area with the modern equipment and dead Trinity soldiers. Examining it reveals the following items on your in-game map: relic #2; documents #4, #5, #8, #11, and #17; murals #1 and #2; and monolith #3. (Click screenshot to enlarge.)