A night spent bathing in the Northern Lights is an experience that many people yearn to have at least once in their life. Perched amidst the mountainous lava fields just outside Reykjavik in Iceland, the ION Hotel allows you to do just that, with the added bonus of being able to reside in luxury at the same time. In a bid to maintain the pollution-free purity of its corner of the world, the hotel is built from recyclable and renewable materials and uses hypoallergenic fairtrade organic linen, water-saving shower systems and geothermal energy.