Golden Circle & Hvammsvík Hot Springs Private Tour

Kerið is a volcanic crater about 270 metres long, 170 metres wide and 55 metres deep, with a blue-green lake at the bottom. Unlike the black basalt found almost everywhere nearby, its walls are deep red, from oxidised volcanic rock. It is thought to have formed when a magma chamber emptied and the ground above collapsed, rather than in a violent explosion. You can walk the rim and, where allowed, down to the water. There is a small entry fee.

Geysir gave every geyser in the world its name. The original Great Geysir now erupts only rarely, sometimes after earthquakes, so the show is Strokkur, a short walk away. It throws boiling water 15 to 20 metres into the air every 5 to 10 minutes, and sometimes a good deal higher, so you will see several eruptions while you are here. Keep to the paths between the pools and stay behind the ropes, as the water is very hot.

Gullfoss, the Golden Falls, drops about 32 metres in two steps into a narrow canyon roughly 70 metres deep and 2.5 kilometres long. The water comes from the Hvítá river, which is fed by the glacier Langjökull. Glacial water often turns golden-brown in sunlight, and rainbows hang in the spray on bright days. A path with stairs leads down to a lower level, closer to the water.

Þingvellir is where Iceland's parliament, the Alþingi, first met in 930, and it lies in a rift valley where the North American and Eurasian plates are pulling apart. Chieftains gathered here every summer, laws were recited from the Lögberg (Law Rock), and the plain below still shows where the assembly booths stood. The lake beside it, Þingvallavatn, is the largest natural lake in Iceland. The park is free to enter and open all year. You walk through Almannagjá, a rift at the edge of the North American plate.

Hvammsvík has eight natural pools on a black sand beach by the fjord, with temperatures from cold sea water up to about 42°C. You move between rock pools, beach pools and the Old Hot Spring, the warmest of the eight, and some pools change with the tide. There is also a sauna and a steam room with fjord views. Shower before you enter, swimwear is required, and towels can be rented on site.