Below is a guide on the 1 artifact, 2 journal entries and 2 trading cards that can be found during The Tunnels chapter in The Last of Us Part II.
Journal Entry
Interact with the sign in front of the large T-Rex to receive the entry.
Trading Card – The Nighthawk
This card can be found on the ground floor just past the main exhibition room on a bench near the bathrooms.
Journal Entry
Interact with one of the two benches that are in the center of the space exhibit just past the mobile.
Trading Card – Saura
After entering the Natural History Center via window, head into the next room with a giant moose statue. The card can be found underneath a bench to the right of the statue.
Artifact – Suicide Note
The artifact can be found next to a corpse near the “There is no light” written on the wall and a butterfly display. You will reach this room after crawling through a hole in the wall to proceed further with the story.
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