advice alert appropriate behavior appropriate behaviour black care caution concern cutout danger dangerous directions emergencies emergency floor information isolated pictogram protect protection safety sign signs slip slippery slippery floor slippery surface slipping warn warning warning sign water wet wet floor wet surface white yellow bricks background deep free photo pool ripples stock summer texture vacation cascade circulate cool falls flow flowing fountain fresh grades ranges rush slump spiral splash stair staircase stairs backdrop structure structures textures architecture building center culture design famous France indoors interior old Paris square stone symmetry trade blue chinese colors colours english languages rain rain-drops asphalt circle cover detail dirty down drain drainage flood grate green grid grunge grungy heavy hole industry iron lid maintenance manhole metal pavement pipe rough rust rusty sewage sewer shape sidewalk sink steel storm street urban waste Alley avenue back street broken burst bust up byway cobblestone concrete corrode corroded course crack cracked crossroad dragway drive flagstone flooring in pieces kaput lane main drag open pike puddle rainy road roadway rock route stones stony tar track trail used way