Martebo lights
The Martebo lights (in Swedish, "Marteboljusen" or "Marteboljuset") are "ghost lights" which have been seen since the early 1900s on a road in Martebo on the Swedish island of Gotland.{{cite web|last1=Wallin |first1=Inga-Lill |title=Marteboljuset |url=http://www.ufo.se/fakta/artiklar/martebo.shtml |website=www.ufo.se |publisher=UFO Sverige |accessdate=16 August 2014 |url-status=dead |archiveurl=https://web.archive.org/web/20100106052523/http://www.ufo.se/fakta/artiklar/martebo.shtml |archivedate=6 January 2010 }} In Sweden, it is believed that the will-o'-the-wisp represents the soul of an unbaptized person "trying to lead travelers to water in the hope of being baptized".The Element Encyclopedia of Vampires (Theresa Cheung), HarperCollins{{cite book|last1=Wallin|first1=Inga-Lill|title=Marteboljuset: myt och verklighet|trans-title=The Martebo light–myth and reality|date=2000|publisher=self|location=Visby|isbn=91-87826-19-4|url=http://libris.kb.se/bib/7767234|language=Swedish|accessdate=16 August 2014}}