Underwater Cave System Sac Actun: The longest cave system in the world
Sac Actun System is now officially the longest flooded cave system in the world – With a total length of 347 kilometers (216 miles), Sac Actun is the largest flooded cave in the worldIt results from many hours of exploration and hard work leading to the connection of Sac Actun System 263 kilometers (161 mi)…