Board Game Arena

When scoring scoring card B ' Lost Barony' you get three points for each tile along the side of the largest filled square.

Do mountains count? If I have a 3 x 3 square, but the top left if a mountain is that 9 points?

Yes mountains and wastelands (Map B) are considered filled spaces

Yes, and don't forget it count as a type for greengold plains!
https://imgur.com/a/1S9xDuC