Hveragerði

Steam hisses from a crack in the pavement. A greenhouse glows with tropical plants heated by the earth beneath it. A café serves bread that was buried in the garden that morning. Hveragerði in south Iceland is where geothermal power isn't abstract — it's the neighbour's heating, the bakery's oven, and the reason bananas grow at 64 degrees north.

Hveragerði sits directly on top of a geothermal hotspot so active that hot springs erupt periodically in people's gardens. A 2008 earthquake opened new vents in the centre of town, which are now part of a public geothermal park where visitors can observe boiling mud pots and fumaroles on a municipal street. The town's greenhouses, heated by geothermal steam, grow tomatoes, peppers, and even bananas — a sight that startles first-time visitors to subarctic Iceland. A 3-kilometre hike up the Reykjadalur valley leads to a geothermally heated river where bathers soak in warm water flowing through a green valley. The local tradition of burying rye bread dough in hot ground and retrieving it 24 hours later, fully baked, is both a tourist attraction and a genuine daily practice.