The Reykjanes Peninsula extends 50 kilometres southwest from Reykjavik into the North Atlantic, marking the only place on Earth where the Mid-Atlantic Ridge rises above sea level.
This narrow strip of basalt and ash formed over the past three million years as the Eurasian and North American tectonic plates pulled apart at a rate of two centimetres annually, creating a landscape defined by fissures, lava tubes, and fumaroles. In 2021 the Fagradalsfjall volcano ended an 800-year dormancy with an effusive eruption that lasted six months, depositing 140 million cubic metres of molten rock across valleys once grazed by sheep. The peninsula has witnessed seven volcanic events since 2021, most recently the Sundhnúkur fissure eruptions of 2024 that severed access roads and forced evacuations in Grindavík.
Today the Reykjanes UNESCO Global Geopark protects 829 square kilometres of volcanic terrain, geothermal fields, and coastal cliffs. The Gunnuhver hot springs discharge superheated steam at 300 degrees Celsius from vents encrusted with sulphur. At Brímanslóð, pillow lavas frozen mid-eruption 12,000 years ago form ridges along a black sand shore. The Bridge Between Continents spans a seven-metre-wide rift where the tectonic boundary cuts through the Sandvík graben. Kleifarvatn lake, Iceland's third deepest, has no visible outflow; water drains through subterranean fissures opened by the 2000 earthquakes that lowered the lake level by four metres.
The peninsula's geothermal activity powers the Svartsengi Resource Park, which supplies hot water to 30,000 residents and generates 76 megawatts of electricity. Runoff from the plant created the Blue Lagoon in 1976, a milky turquoise pool rich in silica and algae. Seltún geothermal area presents boiling mud pots and solfataras tinted ochre and rust by mineral deposits. Reykjanesviti lighthouse, rebuilt in 1908 after its 1878 predecessor collapsed, stands above bird cliffs where kittiwakes and fulmars nest in summer. The Reykjanes Peninsula tour from Reykjavik connects visitors to this active geology, often combined with stops at the Blue Lagoon or circuits tracing fresh lava flows.
7 hr
