Reykjavík is small by world standard but yet has all the usual attractions of a capital city.
The Golden Circle is a condensed version of Iceland and is where most tourists go. There are: Þingvellir where the North American and Eurasian Plates meet, Gullfoss waterfall, Geysir geyser, and Kerið volcanic crater lake.
The famous Blue Logoon spa is actually a man-made pool besides a geothermal plant.