镇店之宝是亚历山大石棺！First time I saw someone mentioned this here...

Indeed, it is very very impressive.  We love the archeology museum, plus it is never crowded there!  There is a small structure near the museum, also opens to the public. For unknown reason, that structure is extremely cold inside, so cold that even in summer time, the staff there wear sweaters.  It is a marble and ceramic wall inside, no manmade air conditioning stuff at all.  Very strange.