Volcanic Shadows: When Past Eruptions Shape the Future.
Tales from the Intra-Caldera Lake Ilopango in El Salvador.
Perfect Storms "Dark Age Volcano" 2013 SD. Robert Dull
Special thanks to History Channel Canada & Robert Dull
The Silent World 1956 HD. Jacques Cousteau
Special thanks to Olga Belka for sharing the video.
Under The Red Sea 1952 HD. Hans Hass
Special thanks to Hans Hass for being a pioneer in the underwater field.
