Virva - f (Finnish) will-o-wisp, ghostfire. In many folklores a will-o-the-wisp is an eerie fire-like light that appears over water at night and leads travelers astray. These have since been explained to be a non-spooky phenomena caused by natural gas. "Will-o-the-wisp" also is used to refer to an unrealistic hope, or something that is fleeting or intangible.












