Golden Circle is the "single" most tourist attraction in Iceland. We put singel in " " because it is not a single tourist attraction but rather three main attraction were different additions to the tours are offered by different touroperators.
In all cases you visit Thingvellir National Park, which has a great historical and geographical significance and a beautiful landscape. Geysir area, which holds Strokkur, one of the (or if not the) most active and reliable geyser in the world and finally Gullfoss (Golden Waterfall), Iceland´s most famous waterfall.
South of Iceland
South Coast has much to offer and is very popular among tourists. The Black Sand Beaches, Beautiful Landscape and Several Waterfalls on the way.
From the South, Landmannalaugar and Þórsmörk (Highlands) are both accessible during summer time via apporpriate vehicles.
Snaefellsnes and Borgarfjordur
The Snaefellsnes Peninsula and Borgarfjordur area is often forgotten when planning a trip to Iceland. Snaefellsnes Peninsula offers beautiful landscape while in Borgarfjordur you can find Deildartunguhver, the most powerful hot springs in Europe and Into the Glacier, which is a man made cave in Europe´s second largest Glacier.
Reykjavik and surroundings
Most of the day tours start in Reykjavik but all kinds of things are also possible to do in Reykjavik. Such as ATV/Quad/Buggy Tours, Horseback-riding, Whale Watching and more.