Ask for Karl from Prime Tours Iceland! - We actually had a two day private tour. We were on the Viking Mars and decided to have private tours while in Reykjavik. It was the best idea! The first day was the Golden Circle and the second day was the Blue Lagoon. There were many sights we were taken two on those days depending on what area we were in and our interests. Our guide was Karl and he was the best guide we have ever had. He was so welcoming, knowledgeable and showed us many interesting things that were unscripted, unlike often experienced on other excursions from cruise ships. He is a former search and rescue ranger, so we felt safe going anywhere with him!! His knowledge of politics, culture, geology and folklore is superior. He is an excellent driver and always concerned for our safety and comfort. He is also a very nice guy, definitely a native Icelander. He knew the best places to shop and eat, a huge plus and less the crowded bus-tourist trap thing. If you are going to Iceland, which when you see the lava fields and geothermal sites is like being on the moon, take the plunge like we did and hire Karl from Prime Tours!