High in Peru’s Sacred Valley lies a site that defies logic and challenges everything we thought we knew about ancient engineering. Ollantaytambo isn’t just a fortress, it’s a riddle carved in stone, one that experts still can’t fully explain. How were massive blocks moved, shaped, and assembled with such precision using no iron tools or wheels? And who truly built it? In this video, we uncover a mystery so deep, it’s been called Peru’s greatest. What we found might change how you see ancient history forever. The truth is buried in the stones... and it’s time to look closer.