gravel mats partly filled with small grey beach pebbles to create a walkway

wall soil flooring walkway yard floor backyard garden brick brickwork natural stone decoration nature grey pebble beach pebbles terrace driveway draining suds grid permeable stabilize gravel mat honeycomb structure fix footpath walk pathway landscape water underground plastic drain ecology black filter hole residential environment path pavement construction outdoor surface urban textured architecture pattern background texture material mats partly filled small create structured