If you want to make the most of one day in south iceland you go on a tour that takes you on the golden circle and to the blue lagoon this private tour does exactly that the golden circle tourist route is the most popular tourist route in iceland over this 300 km loop you are given the opportunity to visit three of the best known tourist attraction in iceland geyser area waterfall gullfoss and thingvellir national park but it is not only those big three that makes this rout so great gr