The Golden Circle is a must-do experience in Reykjavik. Instead of renting a car, you can visit the three main attractions in the morning. These include Thingvellir National Park, where the North American and European tectonic plates meet, the Great Geysir, which gave its name to other geysers, and the roaring Gullfoss Waterfall. After an included lunch at a tomato farm, you may have the opportunity to pet an Icelandic horse. The day will conclude at the geothermal Sky Lagoon.