DAVID NUNUK / SCIENCE PHOTO LIBRARY DAVID NUNUK / SCIENCE PHOTO LIBRARY
Volcanic crater lake. Crater lakes form when a volcano creates a large crater in an eruption, which then becomes filled with water. Such lakes are often hot and acidic. The soil and waters around a volcano are rich in minerals and can support a wide variety of plant life. Photographed on Easter Island (Rapa Nui), a volcanic island in the South Pacific Ocean.
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