Picture by Roger Bamber : 27 September 2011 : One of the tram cars ascends the cliff from the bottom as another descends on the way down on the water- balanced Funicular cliff railway, one of the steepest cliff railways in the world, with a gradient of 35 degrees at The Centre for Alternative Technology, or CAT, Europes leading Eco-centre in Machylleththe 'green capital' of Wales. Llwyngern Quarry, Pantperthog, Machynlleth, Powys, North Wales, UK.