Geothermal

The upside of being a volcanically active country is that you can get 100% of your energy from the earth. Geothermal energy provides all of the heat and electricity for Iceland, and although the hot water frequently has a distinct smell of sulfur, you can linger in a hot shower until your fingers and toes prune up without feeling guilty about it. Which is fortunate, because I found that I needed some very long hot showers to warm up after the long drizzly days.

This is Geysir, source of one of the few words that has made its way into English from Icelandic. There are, unsurprisingly, many geysers there, along with streams and pools of boiling hot water that create a permanent layer of steam wisping over the landscape.