This 249-foot slide will soon be a reality. A team of architects has finished the design for the world’s longest slide, which will wrap around the massive ArcelorMittal Orbit sculpture, originally built for the London 2012 Olympic Games. Once it’s operational in 2016, you can go and pay $8 for a ride that lasts nearly 40 seconds and gets riders to speeds of 15 mph. We can think of no better way to spend 40 seconds of your life.