State Street Subway Station is an abandoned, infected-filled Boston subway stop that Joel, Tess and Ellie pass through in the Downtown section of The Outskirts. The Firefly map artifact lies here next to a dead Firefly on the stairs just inside.
The group reaches the station in Downtown, right after clearing a pack of runners at the far end of the Goldstone Building. Dead Fireflies lie on the stairs between the two escalators: one has a Molotov cocktail beside him, and the one to his right has the Firefly map. It tells a second team to meet at the Capitol under the gold dome and gives a rough description of the girl they are collecting, and Joel reads it as proof these men came from the zone.
Deeper in, a row of shops is crawling with clickers. Behind the register of the first shop on the left, a drawer holds the Note to Derek, a short message about borrowing a bookstore owner's safe that ends in a combination.
Boston slums
The Boston slums, marked Area 5 on military maps, are the poor district of the Boston quarantine zone where the smugglers run an open black market. You walk through them in The Slums section of The Quarantine Zone while hunting the smuggler Robert.
Freedom Museum of Boston
The Freedom Museum of Boston is a history museum about the American Revolutionary War that Joel, Tess and Ellie cut through in the Museum section of The Outskirts. A wave of infected chases them inside, and you fight clickers and runners through its exhibits.
Liberty Gardens
Liberty Gardens is an abandoned two-level mall in Boston where Ellie and Riley spend a night together in Left Behind's flashback chapters. You explore it in Mallrats and Fun and Games, and it gives the final chapter, Escape from Liberty Gardens, its name.
Massachusetts State House
The Massachusetts State House, usually called the Capitol Building in the game, is where Marlene sends Joel and Tess to hand Ellie to a waiting Firefly group. It is the goal of The Outskirts and gives the chapter's last section its name.