Mound Builders: Star Forts of the Rephaim

Mound Builders: Star Forts of the Rephaim
W/ Brian Reece
Powerful fortifications or ancient power stations?
These Star Forts have been built throughout the circle of the earth & in conjunction with their similar shapes and forms can be found usually built atop of so-called hallowed ground. Begs the question what were the ancient structures significance and who built them?