Santorini, Greece
Santorini is defintely a more famous volcano that Wau-en-namus, as the caldera-forming eruption ~3600 years ago could be the source of the Atlantis legend. The center of the caldera is now being filled by Nea Kameni, the small island with the tendrils of lava flows heading off into the sea.
Image: Courtesy of the Image Science & Analysis Laboratory, NASA Johnson Space Center / Taken August 15, 2009.