Heat as infrastructure
Its water is piped tens of kilometres to heat two towns.
Nojhan — CC BY-SA 3.0 · Rémih — CC BY-SA 4.0 · Rémih — CC BY-SA 4.0 · Rémih — CC BY-SA 4.0
Europe's most powerful hot spring by flow: it pumps about a hundred and eighty litres of water per second at close to ninety-seven degrees Celsius. Those figures are the point. The spring is not a spectacular sight — steam rising from red rock with algae — but it demonstrates something fundamental about Iceland: the country sits on the boundary between two tectonic plates, and geothermal heat is not a tourist curiosity but infrastructure. Water from this spring is piped, insulated, to Borgarnes and Akranes tens of kilometres away, and heats the houses there. Nine in ten Icelandic homes are heated geothermally, and almost all electricity comes from renewable sources. This spring is a working part of that system. Practical points: the site is directly on the road and needs almost no walking, and entry is free. The water is near boiling — stay on the walkways and do not touch. Commercial thermal baths sit beside it for a fee.
Its water is piped tens of kilometres to heat two towns.
The share of Icelandic housing heated geothermally.
Ninety-seven degrees — do not approach or touch; stay on the walkways.
Reykholt valley, west Iceland
Hot water is drawn from wells and springs and piped through an insulated network to the towns, entering houses directly for heating and washing. The system was built through the twentieth century and took Iceland from dependence on imported coal to near self-sufficiency. It is why hot tap water in Reykjavik carries a faint sulphur smell — it is genuine geothermal water, not water that has been heated.
The Reykholt valley: the village was the seat of Snorri Sturluson, the thirteenth-century historian and saga writer, with a museum about him and his old stone bathing pool. The Hraunfossar and Barnafoss waterfalls are nearby and among the finest in west Iceland. Half a day covers all three.
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