I was leaving Marinette on Hwy 41 south approximately where the speed limit changes from 45 to 55 keeping in mind, there are no overpasses, bridges, powerlines around me on a double lane split highway trees around . I drove under something very large cylinder looking like black or very dark grey in color with some sort of either large wheels or a hatch visible as I looked up at this object, hovering about 100 feet in the air, completely silent and no lights that I saw .