There are lime kilns at Pwllgwaelod, Aberfforest and Newport, sited on the beaches for the convenience of transport which, for heavy bulky material like limestone and coal, used to be by boat. The kilns are probably about 200 years old and were in use until the beginning of the twentieth century, providing lime for house building and fertiliser for the fields. The kilns are unmarked, unprotected and over-grown  but are a curiosity and treat for walkers along the coastal path. Fearful that these historical landmarks will soon decay beyond recognition, David Kitching is devising a database of all the limekilns in the country. This will become a fascinating resource. View his website here.