Underwater visibility up to 120 meters - only in Iceland. The Silfra National Park boast four active volcanoes and scores of lakes, rivers and waterfalls. And you can even dive between two continental plates.
Read more:
http://www.dw.de/euromaxx-lifestyle-europe-2013-11-26/e-17205600-9798?maca=en-podcast_euromaxx-en-4491-xml-mrsshd#17255816
