Manistique Pumping Station
... that the tower of the Manistique Pumping Station is octagonal on the exterior but has 16 sides inside?
... that the tower of the <b id="mwG0g"><a href="./Manistique_Pumping_Station" id="mwG0k" rel="mw:WikiLink" title="Manistique Pumping Station">Manistique Pumping Station</a></b> is octagonal on the exterior but has 16 sides inside?