With an altitude of 7,711 feet (2,351 m) above sea surface and 20,000 feet (6,098 m) below sea surface to the sea floor, Monte Pico in the Azores Islands (Portugal) is the highest underwater mountain in the world.

The 42 km-long island formed by this volcano is one of the nine islands that conform the Azores and it is also considered to be the youngest.