After breakfast it was on to Thingvellir National Park on the north shore of Thingvallavatn, Icelands' largest natural lake. The park is a UNESCO Heritage site as it where the seperation of the North American and European tectonic plates is measured. Here the plates are currently moving apart at 2 cm / year. The rift runs through the center of the country from southwest to northeast and is surrounded by a region of crust breaks. If anyone offers you a drink of pure glacier water be wary. Think of all the soil and rock that is dragged by glaciers. It takes years for the water to filter out the stuff the glacier carries. For example, water from the Langjokull glacier takes 25 years to make the 35 km trip to Tingvallavatn. Rain water can take 6
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