Context
Martebo is a rural parish in north-west Gotland, about 25 km north of Visby. Its mire, Martebo myr, once covered 1,560 hectares and was drained in the late 1800s. Yet the light that bears its name is mostly seen elsewhere. UFO-Sverige places the hotspot at Nordermyr, about 2 km north, on a side road off Stenkyrkavägen near Knutstorp. A straight forest road. Trees on both sides. The light appears only in darkness.