Rebar railing // I have this in my garden but I used metal box (really economical) section for the rebar to go though. Makes a nice trellis and is really strong. I used it to section off a garden patch. Great for the clematis (fl)
cotton-jones-debora-carl-black-fence/Landscape designer Debora Carl installed a black privacy wall to create an intimate sitting area in an Encinitas, CA garden. Photograph courtesy of Debora Carl Landscape Design.
Gabion walls don't need any kind of drains because they are porous throughout. Gabions can be customized to make them more useful in public spaces. Gabions can be filled with any heavy material--diverse stones, metal artifacts, obtanium, etc.