Although the underground consists of a whole zone to explore, the zone is only used to uncover multiple fast travel locations above ground for quick transport around town. This means that once you have uncovered all exits, there is no need to visit the underground again.
The following is a list of the exits and the solution to open each exit.
Boston Underground
| Crown Coffee House | South Commons | Boston Gate | |
|---|---|---|---|
| Top | Globe | Crown | Assassin Sign |
| Left | Cross | Feather | Female Sign |
| Right | Helm/Wheel | DaVinci Man | Male Sign |
| Bottom | Scales | Assassin Sign | Scales |
New York Underground
| North Dutch Church | St. Paul's Chapel | Trinity Church | |
|---|---|---|---|
| Top | Triangle | Sun | Triangle |
| Left | Cross | Male Sign | Eagle |
| Right | Scales | Assassin Sign | Crown |
| Bottom | Jester | Scales | Assassin Sign |
