They may be some of Israel’s most mysterious structures. They are easy to miss from the roadside but can clearly be seen from the skies or beneath the sea.
The prehistoric stone monuments of Gilgal Refaim, Jethro Cairn and the circular structure found in the sea of the Galilee went unnoticed for centuries in the disputed regions of the Golan and the Galilee but still archaeologists don't know who built them, or why.
Theories have gone wild and include ancient calendars, ceremonial structures, or 'sky burial' sites in which dead bodies were placed on top of stone mounds to be picked apart by vultures. Even more eluding is that that are no archeological evidence of a city near them, and some have therefore posited that the structures is in fact a huge monument carrying symbolic significance
