Neath, north of Swansea and Port Talbot, is steeped in industrial history. And where there was industry, there were usually canals. We like a canal, and my knowledge of them has grown considerable since I met Sal. Even better, Neath has two canals! The Neath and the Tennant. We walked up one and down the other. Later, we looked around Neath, and drove up to Melincourt waterfalls.