In the town of Zawyet El Aryan in Egypt is a structure known as the Unfinished Pyramid, which looks almost identical to one found in Abu Rawash//Rowash/Roash, known as the Pyramid of Djedefre. Both structures are believed to have been pyramids, but there is no reason to assume that was their intended design.
I don’t believe these were pyramid structures, but they were actually part of my proposed Great Pyramid water pump hypothesis, and these two particular structures were the locations of the outflowing water.