King Raneferef (also know has Neferefre) never finished
his pyramid. He ruled for only 3 or 4 years. Today the pyramid appears as
a low mound just south of the pyramid of Neferirkare. In the middle of the
pyramids north side there is decending corridor which opens into the king's
underground chamber. Here one can find a large arch which was once part of
interlocking arch system, an unusual feature of this pyramid.