Legend has it that Alexander's Sarcophogus was crystalline and that he was "buried in the Euphrates river. There is a competing legend that he sarcopogus was carried back to Egypt and taken out to the desert and buried with the Pharohs at, I think Hamunaptra! Supposedly Mark Anthony was taken there by Cleopatra's priests to kneel at Alexanders sarcophogus!
Ain't history fun?