Gleision Colliery, in operation since 1993, works coal under a very steep hillside above the banks of the river Tawe.

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The tiny bones, each about the thickness of pencil lead, were first spotted three years ago by a local caretaker in the outwash from a steep hillside near a well-known fossil site outside Kunming, China.

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For the best views, retreat up the steep hillside (by foot or taxi) to the sleepy town of Monticello, which may lack action but more than makes up for it with sweeping vistas of the sea below and mountains in the distance.

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There is a small information office 2.6km outside the town of Perusic, which marks the entrance to the Grabovaca Cave Park, with a rough trail then leading a further 2km through a flat meadow and up a short steep hillside to the cave entrance.

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Mousehole (pronounced mowzle) is the picture-perfect image of a Cornish village, a dense warren of cobbled lanes, steep alleys and slate-roofed cottages, tumbling down the hillside towards the granite breakwater and the sea.

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The trainees discovered the advantages of levelling the steep slopes into horizontall terraces, in order for the rain to penetrate the hillside rather than running off the surface.

UNESCO: Ecological Sciences for Sustainable Development