Small industrial lime kilns were used to heat limestone to produce lime, which has been used since early civilizations for building mortars and as a stabilizer in mud renders and floors. Because land transportation of minerals like limestone and coal was difficult in the pre-industrial era, they were distributed by sea, and lime was most often manufactured at small coastal ports. The remains of many kilns can still to be seen where a readily accessible source of limestone, and coal or wood for firing the kilns, are close to a landing or port facility. Explore the lime kilns on San Juan Island, Washington with CoastView below. Learn more about lime kilns here. Click here to download the CoastView app and explore the lime kilns of San Juan Island.