Country diary: perplexed by a sign of the tides

Afon Mawddach, Gwynedd: As I pondered my options, pools of water formed in the carpet of vegetation around my boots

Passengers for Morfa Mawddach station, to use the formal language of the announcement, "should inform the conductor that they wish to alight". Your reward, if you do so, is a single narrow platform overlooking the salt marsh on the southern side of the Mawddach estuary. The station was once an important railway junction and, almost hidden by the undergrowth, an abandoned platform edge marks where a second track curled eastward towards Dolgellau. This line has been closed for more than 50 years, but the trackbed has found a new life as a route for walkers and cyclists.