Crossing the Icelandic Arctic Circle, Iceland
Crossing the Arctic Circle takes you into the lands of prolonged days and midnight sun. It is visible on a map - north of which the sun can be seen above the horizon even at midnight during the summer months.
However, during the winter the sun stays below the horizon for most of the day. During the cold winter months, light is provided by the moon and stars in addition to the elusive but spell-binding Northern Lights.