I'm going to Reykjavik for four days in June--the plan is to spend the first two days (including the arrival day) around the city and then use the next two days to explore the area. As I will be solo it looks like it will be cheaper and easier to do the tour thing instead of renting a car. A few questions: 1. The Golden Circle tour appears to be obligatory. There are a million different operators that do similar tours--does anyone have a specific recommendation, or a company to avoid? 1a. Iceland Excursions does an afternoon tour that hits the main Golden Circle sights. The midday pickup would be advantageous so I can enjoy the early sunrise late sunset the previous night. The full day tours include some extra sights along the way--is there anything outside of Þingvellir/Gulfoss/Geysir that I'll really regret not seeing if I take the shorter tour? 2. I'd like to do a more outdoorsy tour on the other day. Iceland Mountain Guides does some neat-looking tours--Hot Springs and Lava Caves (5-6 hours) and a Walk Through Ice and Fire tour (11-12 hours). Both go to the same hot springs and then the Ice and Fire tour goes to a glacier while the lava caves tour goes to...lava caves. Anyone have experience with this tour operator or the specific sights? Is the glacier worth the extra time in the van? 2a. Is there another tour I should consider? Should I save money and just take a bus somewhere for a day hike?