It's here that he didn't sacrifice Isaac ~ or Ishmael ~ or anybody for that matter.
It's been viewed as Abraham's Altar for several thousands of years.
Friend of mine who visited the Dome of the Rock says that inside there is a large stone with a hoofprint on it. Supposedly, according to Moslems, Mohammad visited Jerusalem (in reality or a dream) and his horse mounted up to Heaven at this site.
I'm surprised there were so many people around ready to film this event ~ they must have anticipated it or maybe video cameras are simply so widely used these days somebody has one on somewhere watching something 24/7.
When the Hebrew forces took Jerusalem they eventually built a large Temple at this site. They later rebuilt the Temple site under Herod. Other bits have construction have occurred there from time to time as things needed upgraded, replaced or improved.
If you were some sort of outerspace being and wanted to check out an ancient landmark on Earth, this is definitely one of those spots!