The lower chamber in the solid rock, is a cavernous room of very unusual shape, while the upper chamber, which is called the Queen's Chamber is made of enormous slabs. The blocks that compose the north and south wall are wedge-shaped, with the thickest part of the wedge to the inside. It has a pointed roof of great blocks of stone, inclined upwards and meeting in the middle. This chamber is designed to withstand pressure from within. Inside pressure will tighten up the wedge-shaped blocks that compose the walls.
All observers write of the exquisite precision cutting of the blocks which compose the interior.
Thousands of tourists have searched for flaws in the joints, but no luck. Flawless fitting of the joints, is the crux of this hypothesis. No shoddy workmanship here. Here in the Queen's Chamber, the builders took further precautions against an air leak. In the east wall of the Queen's Chamber is a structural formation, called the Niche.