The country has over three thousand NAMED waterfalls and countless unnamed. They thunder over rocky mega-crevasses left by million year old volcanic eruptions. Deafening. Hypnotic. Intimidating. These are Iceland’s “Foss” or falls which, along with their fjords and the glaciers, define the country’s landscape. Here are three of my favorites: Seljalandsfoss This 1.2-mile out-and-back trail near Þórsmerkurvegur is an easy, but slippery hike once you’ve climbed down into the area …