Essential information. The Northern Lights are a natural phenomenon, so whilst the chances of spotting them are high, sightings cannot be guaranteed. The optimum conditions to view them (away from the city) are in darkness, with minimal light pollution, although the two most important factors to consider are the level of solar activity and if there are clear skies or not, and this is where your guides expertise comes into play. The temperature can drop significantly in the evenings so please ensure you wear plenty of layered warm clothing and sturdy, enclosed shoes as you will be walking on the snow and over uneven ground. This tour is not suitable for guests with medical conditions that are affected by the extreme cold. We recommend that you carry a torch to assist you whilst walking in the darkness, but ask that it is turned off when viewing the lights. There are 3 steps to board the train.