We have a few of these plastic ski slopes in the UK and I have to say on a cold, wet winter evening - which is often when people visit them, getting a bit of pr

We have a few of these plastic ski slopes in the UK and I have to say on a cold, wet winter evening - which is often when people visit them, getting a bit of practice in for a ski holiday in the Alps - they can be bloody miserable. And from experience falling over on one I can testify that plastic has a lot less give in it than snow. Now: an artificial outdoor slope with real snow running from say 2500m down to 1500m, that could be interesting, but would also require the tallest structure on earth.