The Canary Islands are a volcanic chain off the coast of Morocco, and geologically are very much like the Hawaiian islands. They're still active, too: a new volcano is being born even as we watch! Off the westernmost tip of the chain, an as-yet unnamed volcano has been erupting since October 2011. As of March 2012, the peak is still more than 100 meters below the surface of the ocean, but it's growing. By 2014 or so we may have to add a new island to the map of the Canaries.

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Image credit: NASA Earth Observatory/Jesse Allen and Robert Simmon, using EO-1 ALI data