The 4D Tower, standing tall and scraping the Fourth Dimension skies!

The 4D Tower is a major structure in the Fourth Dimension in Into the Fourth Dimension. After Mario beat the huge Shark Plants in his Dowser's Dimensional Swamp, he unlocked the tower and explores it, and then suddenly gets kidnapped by Dowser, who was doing it under Dimentio's orders in order to create Mr. M. There is a watchtower on top of 4D Tower that can only be accessed by a pipe somewhere else in the Fourth Dimension.