Below is a guide on the 1 artifact and 2 coins that can be found in The Marina in The Last of Us Part II.
Coin – Kansas
At the start of the chapter, turn around and head up the stairs. Follow the railing left to find the coin on the ground.
Coin – Louisiana
This can be found at Lenora St. Station. Head to the right of the ramp to find the coin under a tarp hanging off the side of the station.
Artifact – Marina Note
After lifting a heavy grate, proceed into the sewer and follow the path forward to arrive at a marina. The artifact will be located in the kitchen on the counter near a cash register.
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