Passamaquoddy Bay for Cities: Skylines.
Welcome to Passamaquoddy Bay; Mostly Maine, USA to the West with bits o’Canada to the East.
This map isn’t 100% accurate, of course. The scale is a bit too small so that more of the interesting bits could fit in the playable area. The rock placements are either from (very fuzzy) memory or based on slope for areas I’ve not personally visited, and the river between the lakes and the sea had to be forced. Further, the closest real railroad would be a bit off the west edge of the entire map, so I faked one following what otherwise would be a reasonably close Route 1.