Mission Hill Pier is the wharf in the Boston slums where the smuggler Robert runs his trade. Joel and Tess fight through Robert's men here at the end of The Slums section of The Quarantine Zone, then chase him through the area.
Robert sold guns that were owed to Joel and Tess. The pair sneak into the wharf, kill his guards and corner him in an alley.
Under questioning Robert admits he passed the guns to the Fireflies. Joel and Tess kill him and leave before soldiers arrive.
Quarantine zone
Quarantine zones are the walled, military-run safe areas FEDRA set up across the United States after martial law was declared. Most have since fallen to infection, revolt or abandonment. Boston's North End zone is the one you live in and play through at the start of Part I, and you pass the dead zones of Pittsburgh and Salt Lake City later.
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.