The Snaefellsnes Peninsula reads like a historical record of Iceland’s geological backstory, with nearly every chapter of its past represented in unique terrestrial features. And just like a fine wine, it’s matured into an absolute stunner. Only a three-hour drive from Reykjavik on paper, the 100-kilometer-long peninsula could be ticked off in a day. But we recommend allocating two days to drive around a compact smorgasbord of pensive fjords, ancient lava flows and black-sand beaches. Not to mention the snow-covered volcanoes, such as Snæfellsjökull, a 700,000-year-old...