This active volcano still spews gas -- and a major eruption could trigger a deadly tsunami. Locals live in its shadow, knowing history could repeat itself. Nisyros is a small, volcanic island and municipality in the Dodecanese group of islands in the Aegean Sea, located between Kos and Tilos. The Volcano That Could Wipe Out the Greek Islands Volcano Documentary | 44:43 Autentic Documentary | 95.8K subscribers | 58,260 views | December 9, 2025