Rio de Janeiro
I believe the turrets are each spaces where you place all of one color of pieces
Actually, you place one pawn of each color on each turret (and the central space, if required). I don't know why they made them in different colors, but their colors don't match the players', anyway.
Yes, the turrets are separate spaces for the purpose of counting pawns and determining distance of movement, but it seems to be common sense that they are all one step from the road.