Martebo lights
Encyclopedia
Ghost light
Ghost light or ghostlight may refer to:* Will-o'-the-wisp, also called ghost-light in some countries, a natural phenomenon producing a ghostly light sometimes seen at night or twilight over bogs, swamps, and marshes...
s" which have been seen since the early 1900s on a road in Martebo on the Swedish island of Gotland
Gotland
Gotland is a county, province, municipality and diocese of Sweden; it is Sweden's largest island and the largest island in the Baltic Sea. At 3,140 square kilometers in area, the region makes up less than one percent of Sweden's total land area...
.
Some sightings have been explained as car lights.