went to Norway with boys over this w/e. We were vary lucky with the weather - it snowed the first day and was sunny on the second. Mist was hanging everywhere, in some places forming a blanket a few meters above whatever surface there was - lake, field, whatever

saw for the first time in my life something that is apparently called "fogbow" - a white bow, like a rainbow, but with no visible colors. It appeared while Francesco drove us through a valley filled by fog. Sun was behind us and to the left and there was this white arch in front to the right. Apart from not having color, it also appeared "closer" than a rainbow would be - I could "see" where the end of it were touching the field, maybe 30 meters away

http://en.wikipedia.org/wiki/Fogbow