The world's largest volcano has been found at the bottom of the Pacific Ocean.  This volcano is larger than the British Isles.  The volcano is located 1,000 miles east of Japan. The volcano structure rises 2.2 miles above the bottom sea level.  However, this volcano is considered to be inactive.  The volcano covers over 2,000 square miles.  Researchers think this volcano the Tamu Massif is considered to be the largest volcano on earth. Twenty years ago people discovered the formation of this massive beast. There may even be other undiscovered volcanos lurking beneath the oceans waiting to be discovered.