There are lots of reasons to tackle a climbing wall at your local gym: it's great exercise, it can improve your hand-eye coordination, and it helps instill useful mountaineering skills should you ever find yourself trapped on a cliff. But researchers at Aalto University in Finland want to take them one step further…
I'm getting an extreme case of vertigo just by looking at this photo of the 37meter high climbing wall in The Netherlands, which is reported to be the world's tallest.
What do you do with three abandoned sewage treatment silos? If you're the city of Amsterdam, you convert them into absolutely incredible climbing towers.