On our second day in Iceland, we dove right in (pardon the pun!) and took the trip out to Thingvellir National Park to go snorkeling in the Silfra Fissure, a crack in the earth where two tectonic plates – North America and Eurasia are ripping apart at a rate of 2 cm a year. When … More January In Iceland, Part II, Snorkeling the Silfra Fissure