Railroad Ink: Archipelago Boards Set

From Horrible Guild:

Test your railroading skills with the Archipelago Board, divided into four 4×4 Islands that may be connected to the neighboring Islands through Bridge spaces! It also features a new Special Building, the Warehouse, which allows you to “store” routes and save them for later use.

This is an expansion for Railroad Ink or Railroad Ink Challenge! At least one core game is required to play.