The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
Daytine view down into the south crater, with large portions of the inner crater walls that collapsed down (centre) and thick clouds of volcanic gasses obscuring the view of the active lava lake below (top centre and left) (Erta Ale summit caldera) (c)
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