Crater Lake

Almost 8,000 years ago, the peaks of Mount Mazama (pics) towered some 12,000 feet above sea level.  But eventually, the huge chamber of magma beneath the base of the mountain would no longer be contained.  It began to erupt and eventually a series of eruptions formed a ring around the mountain and caused the mountain top to collapse forming a huge caldera.

Crater Lake - Phantom Ship viewpoint

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