A trip out to Thingvellir is an essential part of any trip to Icelend - as well as providing an opportunity to see some Icelandic scenery (albeit a long way from the wildest!) you will reach a place which interesting both for its
a. Geology – this split in the rocks in the photo is the Mid Atlantic Ridge which runs across Iceland as it spreads at around 2 metres per century (Near Myvatn in the north there is a rather nice piece of evidence of this as a water pipe has been parted as it crosses the gap!)"Interesting" as this scenery might be however it is worth noting that it is NOT relelvant to the inscripion of this site which is inscribed on PURELY cultural grounds as a "Cultural Landscape"!
b. History – the site of what claims to be the oldest parliament in the world (starting in 930). The Icelanders gathered here once a year and the Speaker of the Parliament would stand atop the Logberg, or Law Rock, to read the law to the members in the valley below to the left. These are the aspects which Iceland and UNESCO (via ICOMOS) consider make this location a place of universal value!
If you haven’t got your own transport there are daily trips taking in Geyser as well.