Scientists confirm existence of world's 8th lava lake after perilous expedition to South Atlantic's Saunders Island. Mountaineers successfully reach the summit of Mount Michael on Saunders Island, revealing the vast lava lake inside. Discovery of the lava lake will contribute to improving volcanic activity models and monitoring systems.

https://www.livescience.com/planet-earth/volcanos/perilous-expedition-to-uninhabited-island-in-south-atlantic-confirms-existence-of-worlds-8th-lava-lake