Edge of caldera

During the formation of Tenerife, a giant volcano piled up in the middle of the island, which was at least a kilometer higher than the current one, or about five kilometers above sea level. In the course of the action, the bottom pipes of the magma chamber gradually froze over the millennia, the mountain remained empty inside, and about two hundred thousand years ago, the cone collapsed under its own weight, forming a caldera, or crater, or a flat bowl-like formation with a diameter of more than ten kilometers. You are now driving over the edge of this bowl.