This was an absolute must do trip! The guide we had was excellent - really made such a difference with this small bus of people - so knowledgeable, pleasant, actually made the trip even better. The Gullfoss waterfall, the geysers, the Kerid Crater, incidental waterfalls on the way - so much to see all the time, totally wonderful. We stopped at a tomato ranch for lunch - and even that was super interesting, and something very different! Such a great day out with Holiday Tours. We did this in winter, if we visited again in summer, would definitely do it again for a totally different experience.