The following is an excerpt from Zahi Hawass' Blog; click the above link to read his article in it entirety:
The Red (or North) Pyramid at Dashur was King Sneferu’s third attempt at building a massive pyramid. He had already built at Meidum, near the Faiyum Oasis, and at Dashur, resulting in the Bent Pyramid. This time he would get it right from the start, and pave the way for his son Khufu to build the Great Pyramid of Giza.
His article features a few beautiful pictures with captions and a map of the area.