[1.2][bug] Monsters razed cities leave city tiles on the map
An old bug that is still around.
I just had a city I had conquered razed by Ghasa Overheart's (troll shaman) army. When I returned to deal with the Ghara Overheart the city's old tiles showed up on the mini map as city tiles. Look at the 4 tiles between the fire shard and the twilight bees next to Lord Markin's army.
Also if you scroll right you will see Kraxis's last city Abbeagoobra which has been settled on top of an air altar.
Nakisisa