Sweden
250km north of the Arctic Circle, Abisko Mountain Station is an up-market hostel with fantastic food, a glorious location and comfortable, reasonably priced accommodation (including a self-caterring option). It's a short walk to the 20 minute chair lift to the Aurora Sky Station near the top of Mt Nuolja, the driest spot in Sweden and one of the world's best places to see the Aurora Borealis. There's a good chance you'll have a 360 degree show right over your head. One legend has it that the shimmering lights are swans frozen to the sky, struggling to break free. Duck into the sky station cafe every so often for a warm up by the wood stove, hot chocolate and the aurora exhibition. There are guided tours and it's possible to stay up there overnight. By day there are many cross-country ski trails, as well as snow shoeing, ice climbing and the chance to learn about Sami culture and the local flora and fauna.
Details of Abisko Mountain Station on www.abisko.nu/vinter/englishpages/index.asp
www.auroraskystation.se/ for the Aurora Sky Station.
There is a dedicated railway station, 19 hours from Stockholm or one hour from Kiruna.
Google map: tinyurl.com/ylks5b4