Could be an ancient site for
Dolmen
Extremely heavy structures stacked for alignment with energy, and someone would meditate and try to harness that vortex energy.
The ancients, and the farther we go back in history mind you, were far more sophisticated than us. They understood the torsion physics of our universe, they understood resonance, advanced geometry, planetary and star alignments, these people were extremely intelligent, and some of these ruins will remain far longer than the remains if our civilization ended now.
Peace