Mow strips can be made from any solid material used to separate the lawn from a planting bed. They allow a law mower to trim the grass all the way to edge of the lawn without having to use a string trimmer.
Raised flower beds railway sleepers : We have all these tall trees that have big uneven mounds. Would like to have raised beds with railroad ties around. Or I would like safe rockeries as we have so many huge beautiful stones about.