Northern lights

It's taken a while to actually catch them on camera, but here you go.

Before you say anything, no they don't appear every night, and you can't see them at all in the summer due to the light pollution of the sun. However when they do appear they are fantastic to watch. On a good night they stretch from one horizon to the other in a long streak. They're actually less blurry than the photos make out, but that's just a result of the long exposures required to capture them (this photo was 30sec).

If you want to catch them, head up to the arctic circle on a clear night, with a northerly wind, brace yourself for the cold, and be prepared for them to not come at all!