Albert Barnes Commentary Numbers 21:25

"And Israel took all these cities: and Israel dwelt in all the cities of the Amorites, in Heshbon, and in all the towns thereof." — Numbers 21:25 (ASV)

Heshbon - Now Heshban, a ruined city, due east of the point where the Jordan enters the Dead Sea; conspicuous from all parts of the high plateau on which it stands, but concealed, like the rest of the plateau, from the valley beneath.