As amazing as it was to stand on the cliffs of Þingvellir and survey the rift valley where two tectonic plates are separating, it was even more amazing to fly over that same valley. I think I know why so many birds spend their summers in Iceland. The views are hard to beat.
The Haukadalur Valley, found along the Mid-Atlantic Ridge just northeast of Þingvellir, is an especially restless area of geothermal activity. Along with other bubbling pools of rotten-smelling sulfur, it's here that you can find Geysir. This is the original -- the geyser which lends its name to all others.