1

This question already has an answer here:

I've just build a naturalist in my game, and I want to use it's ability to build a national park, but wherever I place it the button doesn't seem to light up.

What determines if a tile is valid as a national park?

marked as duplicate by Vemonus, Wrigglenite, Trent Hawkins, Timmy Jim, Community Dec 5 '16 at 14:25

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Browse other questions tagged or ask your own question.