abundant appearance Arecaceae coconut cocos cocos-nucifera coir cooking copra culinary-use drupe edible endocarp endosperm eyes fibrous flesh food fresh fruit germination-pores hairy hard hardy husk kernel mesocarp monkey-face nutrition nutritiouos palm raw rough stoma surface surfaces texture textures tropical versatile versatility abstract angles backdrop background barrier bolders boulders cemented coated concrete constructed cover covered erosion-prevention fitted hill mortar perspectives random randomly-coursed Rendered retaining-rocks retaining-wall rock rocks rocky rugged secure security slope sloping solid stone stone-walled stones stonework strength strong uneven variations variety wall walled well-built angled blocks bricks color colorful colour colourful Designs detailed detailing distinctive fit fitting footpath grooves ground interlock interlocked interlocking level light path pattern patterned patterns pavement pavers paving paving-bricks shaped shapes smooth textured