YEAR-ROUND TOUR: This 6-hour afternoon tour from Reykjavik explores some of the most popular attractions in all of Iceland. Discover Thingvellir National Park, visit the famous Geysir hot spring area, marvel at the thundering Gullfoss and Faxafoss waterfalls, spend time at the panoramic Kerid crater lake, and explore the geothermal town of Hveragerdi before returning to Reykjavik in the evening.