Keywords: Tree Pits, Version 2.0 With Glued Stones.jpg Tree pit surround in a street in Auckland New Zealand The previous version literally had little round stones rolling everywhere on the more hillier sections of Auckland's street So they came up with this variant where the stones are glued together One assumes that water can still get through to the roots or it would be a bit pointless Locks great in any case though after a year or two they seem to start cracking apart self-photographed 2010 Uploader Photos taken by Ingolfson 2010 in New Zealand Tree pits Streets in Auckland Round structures Adhesives Pebbles |