London loves a good water feature but we don't have anything quite as impressive as Geneva's Jet d'Eau. Situated at the point where Lake Geneva empties into the Rhône, the massive fountain sends a spurt of water up 140 metres into the air. It can be seen throughout the city and even from the air when you're flying over Geneva. Unfortunately we can't quite see it from England so a miniature version measuring 15 metres is being constructed in Broadgate's Exchange Square. Here’s the catch: to get the jet going visitors to the fountain have to hop on a power bike and pedal their hearts out to keep the water pressure up. There are prizes for those with the longest cycle time, including weekends away in Geneva. There will be other Swiss-themed activities on the day too, including chocolate and wine tasting and a photo booth.