John Gill Commentary Numbers 23:28

"And Balak took Balaam unto the top of Peor, that looketh down upon the desert." — Numbers 23:28 (ASV)

And Balak brought Balaam to the top of Peor
The name of an high mountain in Moab, so called from a gap or opening in it; here the idol Baal was worshipped, and from hence had the name of Baalpeor, (Numbers 25:3) and here, very probably, was a temple built to the honour of him, called Bethpeor, the house or temple of Baalpeor, (Deuteronomy 34:6) ,

that looketh towards Jeshimon ;
as Pisgah also did, and very likely it was not far from it, since from thence they came hither, (Numbers 23:14) (21:20) . Jeshimon is the same with Bethjesimoth, and so the Targum of Jonathan here calls it, a part of the plains of Moab, where Israel lay encamped, (Numbers 33:49) so that from hence Balaam could have a full view of them.