On November 20, 1980, a routine oil drilling operation in Lake Peigneur, Louisiana, turned into an extraordinary natural disaster. An oil drilling bit struck the bottom of the lake and accidentally pierced the ceiling of an active salt mine beneath it. Freshwater from the lake rushed into the mine, creating a massive whirlpool that rapidly consumed the surrounding environment. Within hours, the entire lake had drained into the underground galleries, and the landscape was forever altered. A drilling platform, barges, trees, and parts of the shoreline vanished into the vortex, while the canal that normally carried water from the lake to the Gulf of Mexico reversed its flow, briefly creating the highest waterfall in Louisiana. The incident began with a standard drilling operation. Texaco had secured the rights to drill beneath Lake Peigneur, a small freshwater lake in Iberia Parish, and subcontracted the work to Wilson Brothers. Their goal was to search for oil trapped beneath salt domes, which are common in southern Louisiana. Nearby, the Diamond Crystal Salt Company had been mining salt under the lake for decades, with extensive underground tunnels stretching deep below the surface. The lake itself was located next to Jefferson Island, one of five salt domes known as the "Five Islands." That morning, the drilling team encountered an unexpected problem: their 14-inch drill bit became stuck. As they tried to free it, strange noises came from below, followed by a sudden tilt of the drilling platform. Recognizing the danger, the workers quickly evacuated to the shore. Moments later, the entire lake collapsed into a massive whirlpool, swallowing the platform and other nearby structures. The breach grew rapidly as freshwater from the lake dissolved the salt ceiling of the mine, creating a feedback loop of increasing destruction. The whirlpool, estimated to be a quarter of a mile wide, consumed everything on the surface—drilling platforms, barges, trees, and parts of the shoreline. Underground, an electrician named Junius Gaddison was the first to notice the danger. While checking cables at a depth of 1,300 feet, he heard a strange knocking and saw a stream of muddy water advancing toward his station. He immediately raised the alarm, allowing the 50 miners underground to evacuate safely. Meanwhile, the reversed flow of the Delcambre Canal, which normally drained the lake into the Gulf of Mexico, created a dramatic 164-foot waterfall as salt water rushed into the now-empty lake bed. In the days that followed, the lake transformed into a salty, deeper body of water, unrecognizable from its former self. Surprisingly, most of the submerged barges resurfaced intact as the lake refilled. However, the disaster had long-term consequences for the region. The local economy, which relied heavily on shrimp fishing and salt production, suffered significant declines. Today, the area is used for natural gas storage in the remaining underground cavities, a change that has sparked local resistance. The events of November 20, 1980, remain a quiet but enduring reminder of the fragile boundary between the surface and the subsurface.