A pale Reykjavik dawn slides under the van’s windshield as your guide greets you with a name card and a thermos of hot water for tea. The city’s colored rooftops blur into open lava fields within an hour; the road hums and the landscape shifts from tidy suburb to tectonic theater. At Þingvellir the rift valley opens like a seam in the earth — basalt cliffs and fissures carved by the slow, inexorable pull of the Eurasian and North American plates. Here the air tastes of cold water and peat; your guide points out the spot where Iceland’s Viking-age parliament, the Alþingi, convened in 930 AD and explains how law and landscape have been braided since.