WALKERS step out on the world’s longest suspension footbridge. Spanning 2,365ft — two London Shards, laid end to end — it hangs 311ft in the air. Visitors step onto the bridge at an altitude of 3,690ft and off it at 3,723ft above sea levelGetty The Sky Bridge 721, which is just under 4ft wide, links two hiker-trail mountains in Dolní Morava, Czech Republic. Visitors step onto the bridge at an altitude of 3,690ft and off it at 3,723ft above sea level. It is the world’s longest footbridge. Designers say it will give visitors a “breathtaking spectacle and adrenaline rush”. Most read in News MID-AIR TRAGEDY Brit man dies onboard flight to Portugal after crew find him unconscious CLASS ACTION Major schools change revealed as Charles steps in for Queen's Speech DUTY CALLS Charles sits next to Queen's crown as she skips Parliament for 1st time in 59yrs PURE EVIL Twisted mum-of-one, 27, helped her rapist boyfriend, 38, abuse two young girls TAKE VLAD Moment Ukraine drone blasts ‘Putin’s personal parade boat with laser-guided bomb’ DEADLY CHASE Prison officer who sprung convict lover shoots herself after 11 days on run Read More on The Sun 'IS THAT A BAD WORD?' Watch awkward moment Emma Raducanu accidentally swears in Italian DAYTIME ROMPS I pay my kids to go away so I can have hour-long sex sessions, says Caprice It officially opens on Friday. EPAThe Sky Bridge 721 links two hiker-trail mountains in the Czech Republic[/caption] EPADesigners say it will give visitors a ‘breathtaking spectacle and adrenaline rush’[/caption] GettySpanning 2,365ft — two London Shards, laid end to end — it hangs 311ft in the air[/caption]