In the shallow waters between India and Sri Lanka lies a curious formation: a 20-mile-long chain of limestone shoals, stretching in a near-perfect line. It's called Adam’s Bridge or Rama’s Bridge and it’s clearly visible on satellite imagery.

For years it was dismissed as a natural formation. But recent surveys and studies have raised serious questions. The formation is about 35 kilometers long and 3.5 kilometers wide, a precise 10:1 ratio that mirrors a description found in one of the world’s oldest epics: the Ramayana.

That epic describes a bridge built by Rama’s army to reach Lanka, constructed with stone, wood and rope and names the engineer as Nala. Until recently, many assumed it was just mythology. But the Geological Survey of India drilled into the formation and found layered materials: wood, coral and stone, resting over marine sand. Not what you’d expect from a naturally occurring sandbar.

Is it possible that this is a man-altered structure, tens of thousands of years old? Or at the very least, a natural formation enhanced by ancient engineering?