The ark is held off the ground by a series of concrete towers, and the back (or "starboard") side of the hull merges into three masonry towers containing stairwells, elevators, and restrooms.
The ark is held off the ground by a series of concrete towers, and the back (or "starboard") side of the hull merges into three masonry towers. These three masonry towers are containing stairwells. These three masonry towers are containing elevators. These three masonry towers are containing restrooms.