Lighthouses are extreme and iconic buildings. Remote, intrinsically conspicuous and built to withstand extreme environments. For this list I've picked some interesting lighthouses themselves, such as the transparent latticework hyperboloid structure by Russian engineer Vladimir Shukhov or the haunting abandoned soviet nuclear powered polar lighthouses. In addition I've chosen some interesting elements from the giant fresnel lenses lamps to the traveling libraries that the predecessor to the US coastguard used to pass around to lighthouse keepers to keep their sanity.