Witness the phenomenon that is the Mirrie Dancers, or as they're more commonly known, the Northern Lights. These spectral curtains of green and sometimes pink, orange and purple set clear skies alight and truly are a sight to behold. This enigmatic symphony is one of the many delights of a Shetland winter, but you shouldn’t travel here specifically to see them – they’re too elusive for that – but it’s worth bringing a tripod with you just in case.