The Dome of the Rock in Jerusalem,
Israel.
It stands over where God's Temple lay
in times past, over the Holy of Holies - the holiest piece of real
estate for over 1,000 years - until Jesus came. It also stands over
the Foundation Stoner, the same spot where God created Adam from the
dust of the earth, according to ancient Jewish tradition.
So basically it's very Holy and
historical and prophetically important to Jews and Christians alike.
Neither Jerusalem nor this place is mentioned in the Quran once, yet
Muslims revere it (Jerusalem is mentioned in the Bible at least 800
times)

