Expeditions

Expeditions are an upcoming gameplay mechanic to Fallout 76. The system takes a role similar to the add-ons of Fallout 3, Fallout: New Vegas and Fallout 4, in that they allow players to explore travel outside of Appalachia. Players will encounter quests and NPCs.

The first "Expedition" is Expeditions: The Pitt.

Behind the scenes
According to Steve Massey, the next city after the Pitt will be a city never before seen in the series.