Great Pyramid of Giza diagram

After the Great Pyramid was initially sealed, it's original entrance was hidden and faced with smooth limestone. Because this blended in so well with the surrounding casing, the opening was invisible. Around 820 AD, Abdullah Al Mamun mobilized men to bore a tunnel into the pyramid to search for chambers and treasure. Due to the difficulty of the task of breaking up the hard rock, fires were built to heat the rock and then cold vinegar was poured over the heated rock. Battering rams were used to pound away the weakened rock and clear a tunnel. Eventually, a passageway was found which descended into the lowest chamber of the pyramid. Following this passageway back upward, the original entrance was finally located. In these pictures of the NORTH side you can see the intrusive entrance lower down, and the original entrance higher up flanked by angled stones:

From the outside, nearby the original entrance. When you look at the remaining view on the lower left you can see a granite block, considered to be the huge portcullis obstructs which were initially decreased in antechamber to seal the key burial chamber. These have got all already been taken out of their initial location, that one stays here. The picture on the right is looking along the original entrance through the grating this is certainly today positioned, this passageway works over 100 yards in length to the subterranean chamber:

Here, we enter the intrusive passageway, that present times may be the primary entrance. You can spot the rough nature with this tunneling, as the initial passageways and chambers inside pyramid tend to be smooth and completed:

Suitable view includes modern steel braces of included with strengthen this tunneled passageway.

As stated, the original entry passageway ended up being refound, this very first view shows the descending passageway leading to the most affordable subterranean chamber, also leading support towards initial orifice. Through the invasive tunneling, supposedly the sound of dropping stone was heard above exposing the existence of an upper cavity. Al Mamun tunneled toward the noise and, amazing, burst into an ascending passageway. The second view shows the initial granite obstructs, known as portcullis blocks, that were emerge location to originally seal use of these top passageways and chambers. Whenever Mamun had bored until the ascending passageway he'd tunneled merely to along side it of those blocks which are however in their original place:

Today modern-day actions lead you to a ramp that encircles the portcullis blocks and lead up through ascending passageway.

Follow after that as we enter the ascending passageway leading into magnificent Grand Gallery. From right here we could go into the two main chambers associated with the upper area, now called the Queen's and King's chambers and explore the antechamber right before the King's Chamber:

To go through the ascending passageway and explore top of the passageways and chambers,