A drone was lowered into the Bermuda Triangle, and what it brought back has sparked a worldwide frenzy. The device captured footage from a depth rarely seen by human eyes, revealing an enormous structure resting on the ocean floor.

For decades, the Bermuda Triangle has been associated with stories of ships and aircraft disappearing without a trace. A 2001 sonar survey off the coast of Cuba produced images of large, geometrically regular blocks on the ocean floor at a depth of about 700 meters. No follow-up expedition has returned to the site, and no scientific consensus has been reached about what the images show.The name “B…

Twenty-five years after divers first mapped Cuba’s mysterious underwater pyramids, a new expedition finally returned—and the sonar screens went dark before the images ever surfaced. The ancient stone structures, discovered off the coast in 2001, were long dismissed as a geological fluke.

In May 2001, a marine survey team working off Cuba’s Guanahacabibes Peninsula detected unusual formations on the seafloor at a depth of roughly 2,000 feet. The team, led by engineer Paulina Zelitsky and her husband Paul Weinzweig, was under contract with the Cuban government to search for colonial-era shipwrecks. Using side-scan sonar, they located what appeared to be straight edges, circular outl…