Chapter 20: Road to the Aquarium (Seattle Day 3) contains 10 Collectible Locations in The Last of Us 2 (TLOU2). This walkthrough will guide you to all collectibles in Road to the Aquarium Chapter in chronological order. Everything that’s needed for trophies and 100% completion is included: Artifacts, Journal Entries, Trading Cards, Coins, Safes, Training Manuals, Workbenches, Weapons, Supplements (Player Upgrades), Parts (Weapon Upgrades).
If you forget a Collectible you can still get it via Chapter Select, so nothing is missable.
- Artifacts: 3
- Trading Cards: 4
- Journal Entries: 1
- Workbenches: 2
Video Guide
Trading Card #1: Esquire
At the start of the chapter, to the left before going through the red curtain backstage.
Parts x3
After leaving the theater, while following Jesse in the first building on the right “Frontier Rental Car” (in backoffice drawer).
Supplements x17 + Parts x17
When passing through the “WDL” Shipping & Packaging shop, after going through the first door in the building there are 17 Supplements in the cafeteria (cupboard) & 17 Parts in the bathroom.
Trading Card #2: Tormentra + Supplements x6
From the last location, enter the next room on the right (still inside “WDL” building). Some rubble is blocking the way but you can hold 
to crawl under it. This room has a Trading Card, Workbench, 6 Supplements.
Workbench #1
Same location as above.
Supplements x10
When you first encounter enemies with Jessie, go into the first building on the right and they’re at the back on a computer desk.
Parts x9
Later into the chapter, when Ellie and Jesse go swimming, at the end of the water dive down to find 9 Parts on the floor underwater.
Artifact #1: Garage Note
After Ellie and Jesse finish swimming, there will be a dark garage in front of them (Ellie says “Psst, Infected”). Kill the 3 Infected in the garage. At the end of the garage you can climb up a car to the left to reach a broken road. There’s the Artifact document. The parking garage is just before “Kingston’s Bookstore”
Trading Card #3: Tanager
The next building you’ll enter is called “Kingston’s Bookstore” (can’t miss it, automatic story progress). On the bookstore’s ground floor there’s a piece of rubble next to the security gate. Crawl under this rubble for a well-hidden Trading Card on a shelf (turn on flashlight 
to see it more easily).
Artifact #2: Bookstore Note
Same room as before, in the children’s book section of the bookstore (corner of ground floor). Read the document on the table.
Journal Entry #1
In the exact same spot as the above Artifact you can see a Mushroom by the wall, the Journal Icon should be easily visible on it.
Part x1 + Supplements x11
When you drop down to the exit of the bookstore, before heading outside turn around and crawl under the broken floor (1 Part on left on rubble, 11 Supplements on left behind rubble).
Artifact #3: Textile Note + Supplements x18
During the next enemy encounter go into the big store on the right “Rachel’s Fabrics”. On the upper floor you find a document pinned to a wall. 18 Supplements are in the same room on a desk in the corner.
Workbench #2 + Parts x15
After diving the next time, you’ll enter the ruins of a warehouse. On the upper floor is a workbench and also 15 Upgrade Parts next to it.
Parts x10
From the workbench climb up one floor to find 10 Upgrade Parts on a metal shelf.
Trading Card #4: Tatuaje + Parts x6
After the next cutscene you’ll enter a dark building. Drop down one floor and check behind the wooden table you have to hop over for story purposes. This is just a few seconds BEFORE lifting some metal pipes out of the way ( 
button prompt). If you get to the pipes, DON’T lift them yet as there’s no way back. In the same room, to the right of the pipes you can crawl under some rubble to find 6 Parts behind.
That’s 100% of the collectibles you can find in Chapter 20: Road to the Aquarium in The Last of Us Part II.
For more Collectible Guides, check out the complete The Last of Us 2 Collectibles Guide.
Missed 6 Parts just to the right side of the Tatuaje card (alternate way to get to the pipes)
Came here to mention this also 🙂
There’s 10 supplements on the right building after you squeeze through the truck with Jesse. Comes after Workbench 1. It’s where your first encounter of the chapter is.
There are also 9 parts down the water where you swim with Jesse after identifying the Ferris Wheel.
Also, 9 parts down the water where you swim with Jesse after identifying the Ferris Wheel.
Sorry for a duplicate comment, thought the other one didnt get through.
There are also 3 parts in the Garage area where the Stalkers + 1 clicker are.
Thanks, appreciate the extra info. Will look into these shortly =)
After swimming and grabbing the 9 parts, in the dark garage there is an office in the right corner that has 2 parts on the desk and 1 part on the shelf.
I’ve also seen the same 3 parts in that garage with the note before the bookstore.
There are also parts in a shipping container on a small shore once you’re in the boat past the initial falls—before going over the fallen gate.
When reaching the 2nd level for the artefact there are three more clickers/runners
There are 3 parts in the same garage as the “garage note” they’re in the corner office (opposite side and opposite corner of where the garage note is located)
Also there are 4 parts in the room to your right after killing the 3 infected in the garage 🙂
You missed some parts. In the car park where you fight the infected, there is a hole in the wall you can go through to find more parts x4 i think.
I can’t seem to find the 9 parts in the water near the beginning of the chapter. Does anyone else have this problem?
Suplements and Parts x17 in “WDL” Shipping & Packaging shop not appearing to me. Dind’t finish Ellie upgrades… Anyone know why this is happening?
Also, I am playing on grounded
There are also 3 parts inside the parking garage you enter right after Ellie says “Psst, infected.” They are in a small enclosed area you can crawl into that is on the right when you enter. The are in the opposite corner from where you find the Garage Note on the dead body.