Ophel - hill; mound, the long, narrow, rounded promontory on the southern slope of the temple hill in Jerusalem, between the Tyropoeon and the Kedron valley (2 Chr. 27:3; 33:14; Neh. 3:26, 27). It was surrounded by a separate wall, and was occupied by the Nethinim after the Captivity. This wall has been discovered by the engineers of the Palestine Exploration Fund at the south-eastern angle of the temple area. It is 4 feet below the present surface. In 2 Kings 5:24 this word is translated "tower" (R.V., "hill"), denoting probably some eminence near Elisha's house.
In the 1999 book The Temples that Jerusalem Forgot Dr. Ernest L. Martin claims Ophel as the original location of the Jewish temple.