No, he said, because its filled with water.

This is nonsense, "I said Abbas Nadim. He handed the officer that the group should visit the pyramid. After long negotiations, we have allowed to leave the bus - with the condition that all would remain in place. I was allowed to approach the pyramid, taking the same escort. 
I chose Harvey X, editor of the Washington department of a major daily newspaper, which was to assume the responsibilities of the photographer. Close to the pyramid, we noticed that the surrounding area was extensive ispeschrena round holes - remnants of "labyrinth" or part of his underground "chamber" (photo 35). Pyramid resembled those that we saw in Dashure, but it was built from mud bricks and faced with limestone slabs, many of whom were absent. To my great surprise, there was a guard in the traditional long kaftane. It is little understood in English, and I in Arabic, in addition, we helped ourselves a universal language of gestures. The guard confirmed that it is indeed a pyramid Amenemhata III in Hawar. I asked whether it was possible to enter inside. No, he said, because its filled with water. 
Water? We looked inside Harvey. Indeed, after a few steps down, it was possible to see that the pyramid is filled with water. But where it did here? The pyramid was situated at a distance of twenty miles from the lake and a few miles from the line of trees, indicating the boundary of groundwater. I asked where the water comes here. Of the Bahr Yusuf, the guard replied, explaining that the pyramid is connected by underground conduit to the "channel of Joseph." Does the water level in different seasons, I asked? No, it remains unchanged. 
The fact that a pyramid built by Pharaoh, which is connected to the lake at Al-Fayum, was originally connected to the "channel of Joseph" was a real discovery for us - it had not been mentioned in any book on the pyramids. It has also sought confirmation of the revolutionary idea that Joseph saved Egypt, making the stocks of grain are not (they have also laid annually) and water.