abstract background beginning bolders boulders color colour cover covered creeper green greenery growing growth large mortar mound new-growth plant potential retaining-rocks rocks rocky rough small sprouting surface texture textures vegetation wall activities adventure adventure-playground angles children children’s-playground climbing down equipment families fun kids leisure light log-steps lookout park path paths peaceful perspective playground playing public quiet relaxing rocky-mound safety shade shaded shadows shady sheltered stairs steps sunlight sunshine tranquil view architectural-elements care caution colors colours concrete handrails height high open plants railing rails slabs slope sloping steep stones stonework strong sturdy style barrier constructed fitted fitting limestone local-stone perspectives random randomly-coursed rugged secure security shaped shapes sharp solid stone stone-walled strength surfaced surfaces uneven variations variety active carved carvings crawling dark entrance exit hiding shelter suburban trees tunnel woodwork cubby hut