The Earth’s Largest and Most Perfect: Visit Tanzania’s Ngorongoro Crater
This highly visited African attraction is the world’s largest inactive, unbroken and unfilled volcanic caldera. So what’s a caldera? A caldera is a large depression formed when a volcano erupts and collapses. During a volcanic eruption, magma present in the magma chamber underneath the volcano is expelled, often forcefully. National Geographic One of the Seven And more
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