A **caldera** is a large, bowl-shaped volcanic depression formed when a volcano erupts and collapses. After a massive eruption empties the magma chamber beneath the volcano, there is no support for the land above, causing it to sink and form a caldera. Calderas can span several kilometers in diameter and may later fill with water to become lakes. They are different from craters, which are smaller and formed by explosive activity. Famous examples include **Yellowstone Caldera** in the USA and **Toba Caldera** in Indonesia. Calderas often indicate past supervolcanic eruptions and are closely studied for signs of future volcanic activity. @Caldera Official #Caldera