The world’s longest flooded cave has been uncovered in the Yucatán Peninsula, east Mexico. The passage that divers from the Great Maya Aquifer Project found, connects two underwater caves – the Sac Actun and Dos Ojos – and is 216 miles long. It will now be known as the Sac Actun system. Divers have long known that many of Yucatán’s underground caves and rivers are connected, but this recent discovery involved years of searching through a labyrinth of passageways. Many of the caves in the Yucatán were actually above sea level and dry at one time.

Source: Irish Examiner January 18, 2018 11:37 UTC