The burial-place of Aaron, which, according to Num. xx. 23-28, was Mount Hor, on the edge of the land of Edom. A later tradition, evidently of Mohammedan origin, refers to this hill as the one near Petra, called the Hill of Aaron. On its summit Aaron's tomb is still pointed out. This identification, however, does not agree with the itinerary of the Hebrews from Kadesh, as given in Num. xxxiii. 37, 38.
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from http://www.jewishencyclopedia.com
Кстати, насколько я знаю, из Израиля возят на эту гору группы религиозных евреев.