Quote Originally Posted by Goofball
I own the north African province that contains the Tingi settlement, but the game won't let me construct watchtowers in it. The option for building watchtowers with my generals is "greyed out" and when I move the cursor over it it says something like "can not build watchtowers or forts here."

What gives?
It´s the same with Libya in my game. Sometimes though there is a hidden foreign spy (that you can´t see) in the adjacent tile to your general. Moving him in a clockwise way will flush the spy out. I don´t think this is the case in your example though.