A volcano that looks like a large depression in the ground is called a caldera.

Here's why:

* Formation: Calderas are formed when a large eruption empties the magma chamber beneath a volcano, causing the ground to collapse inward. This creates a vast, bowl-shaped depression.

* Size: Calderas are significantly larger than volcanic craters, which are formed by the explosion of a single vent.

* Examples: Famous examples of calderas include Yellowstone Caldera in the US, and the Aira Caldera in Japan.

Let me know if you have any other questions about volcanoes!