Genesis 12:8: A tent on the ridge with a town on either side of it, and an altar

This is the most precisely sited sentence in Abraham's life. Most of the time the text says he came to a place, or lived in a land, or journeyed toward a region. Here it fixes the tent by triangulation: "he moved to the hill country on the east of Bethel and pitched his tent, with Bethel on the west and Ai on the east." Two towns, two compass bearings, and the camp is the point between them. The two tells are about two miles apart, on the watershed twelve miles north of Jerusalem, at around three thousand feet. Bethel is Beitin; Ai is generally et-Tell, on the eastern lip of the ridge where the ground begins to fall away into the wilderness and, eventually, four thousand feet down to the Jordan. So the camp is on the spine of the country with the settled hill country behind it to the west and the drop to the rift in front of it to the east. It is a place chosen for grazing and for view, and it is where Genesis keeps coming back to. It comes back almost immediately. Genesis 13:3 walks Abram up out of Egypt and the Negeb "as far as Bethel to the place where his tent had been at the beginning, between Bethel and Ai" — the same two miles of ridge, named the same way, and the text is explicit that it is the same spot. From this ground Lot lifts up his eyes and looks east over the edge at the Jordan valley, and chooses it. And there is the altar, the second of the three Abram builds in Canaan and the first one he calls on the name of the LORD at. The pattern of his life in the land is set in these two verses: he does not own the ground, he does not build a town on it, he pitches a tent and builds an altar and moves on. Bethel keeps the memory — the name means house of God, and Jacob will give it that name for his own reasons a generation later, on ground his grandfather had already put an altar on.