Largest lake [Underground]
Last updated: October 15, 2017 at 16:45 pm
Dragon’s Breath Cave (Namibia) is the world’s largest non-subglacial underground lake. When discovered in 1986 by the South African Speleological Association, its surface area was 2.6 ha (6.4 acres). As of 2014, it had been explored to a depth of 131 m (430 ft).