By the light of the silvery moon: night walking in Wales’ Brecon Beacons

‘A spectral moonlight ignites the imagination at Garn Goch.’ Photograph: Doug McKinlay

I’m under the moonlight, the serious moonlight, and my imagination’s running riot. Surrounded by vast mounds of rocks – the chaotic remains of 2,000-year-old ramparts – I picture families clad in animal skins huddled around their roundhouse hearths, secure from the savage winter chill, howling wolves and marauding Celtic tribes.