Mashhhad, Iran, is the site for the burial places and shrines for all twelve of the imams revered by the Twelver Shia Muslims.
...But you know this isn't true, because if it was there would have been front page stories, riots, Molotov cocktails and embassies burning to the ground.
What ACTUALLY happened, you ask?
"...Palestinians yesterday tried to burn down Joseph's Tomb – Judaism's third holiest site – according to Palestinian security officials speaking to WND.
It marks the second time the Palestinians attempted to burn down the tomb, located near Nablus, the biblical city of Shechem.
Joseph's Tomb is the believed burial place of the biblical patriarch Joseph, the son of Jacob who was sold by his brothers into slavery and later became viceroy of Egypt.
Palestinian security officials in Nablus said yesterday they were called to the tomb to find 16 burning tires inside the sacred structure.
A Palestinian police official who inspected the site told WND today there was some fire damage to the tomb. He said the Palestinian Authority, fearing embarrassment, immediately formed a joint committee from the PA's Force 17, Preventative Security Services and Palestinian intelligence, to find out who was behind the fire..." (source)