It's the busy summer season. A fox family is playing below the Carmarthen Fans, lizards bask in the sun on limestone pavements in the upper Swansea valley and hundreds of dragonflies emerge from pools in the uplands near Brecon. Iolo Williams is on the Black Mountain foothills as sheep are gathered by shepherds on horseback and a group of dedicated volunteers are trying to repair a mountain. Ancient botanical cures for ailments and old steam railways are two of many hidden histories.