Ride the slide at the arcelormittal orbit visitors will descend the worlds highest and at 178m the worlds longest tunnel slide as they travel down the uks tallest public artwork theyll pass through light and dark sections with londons dramatic skyscape whizzing by in the 40 second trip visitors will circle around the arcelormittal orbit 12 times as they weave their way through the famous loops and curves of the iconic structure including a tight corkscrew section names the bettfed