After the enormous Giza pyramid of the 4th dynasty, the monuments quickly began to shrink in size. The pharaoh Userkaf was the first king of the 5th dynasty and his pyramid was known as 'The Ruined Pyramid'. Almost nobody has been inside since the explorers of the early 1800's.

We take a rare tour through the pyramid substructure, exploring its inner chambers which are remarkably well-preserved. Userkaf's pyramid complex is unique in many important ways, and the hidden interior has some anomalous features that help unlock the secrets of all Old Kingdom pyramids - including the Great Pyramid.

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Special thanks to Valery Senmuth, who manages to gain access and shares the imagery online. His YouTube channel is: https://www.youtube.com/c/Senmuthmusic

0:00 Intro
1:08 5th & 6th Dynasty pyramids
2:39 Userkaf's unique design
4:00 Valery Senmuth
4:35 Pyramid overview
5:53 Pyramid entrance
7:52 Entrance chamber / vestibule
9:32 Granite torus lintel
11:03 Single portcullis
12:51 Storage in bedrock
14:03 Antechamber
14:25 Burial Chamber
15:00 Sarcophagus
15:59 Further investigation