About the Golden Circle afternoon tour
This is the same Golden Circle route as the classic day tour, run as an afternoon departure instead of a morning one. Pick-up is around midday, so it works well if you're arriving in Iceland that morning, or you'd rather have your morning free before a 6 hour trip.
The minibus takes a small group with a certified guide to Þingvellir National Park, the geothermal area at Geysir, and Gullfoss waterfall, then adds Kerið, a red volcanic crater with a lake at the bottom, on the way back. Walks at each stop are short and easy, so it suits most ages and fitness levels.
The Golden Circle is Iceland's most visited route, so expect other buses at the same stops, especially in summer. In winter the light is different and days are shorter, but the sites themselves are open all year, and the guide will point out how conditions change the visit at that time of year.