U.S. News Insider Tip: While Gullfoss and Þingvellir National Park are the main attractions on this route, do as the locals do and stop by the Friðheimar greenhouses. Friðheimar grows tomatoes ...

See Iceland’s “Big Three” wonders, known as the Golden Circle — the UNESCO World Heritage Site of Þingvellir National Park; the two-tiered “Golden Waterfall” of Gullfoss; and Strokkur, an active ...