Every day, thousands of people walk right over a secret world, hidden under Sydney's CBD… #9News | http://9News.com.au | 9 News Sydney
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Experts are still baffled about why this secret network of tunnels under Sydney Harbour was built. MORE - Stories from 7 News http://bit.ly/7NewsStories #SydneyHarbour #Tunnels #7News | 7NEWS Sydney
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21 reactions | The unused Wynyard Station tunnels have opened to the public for the very first time. There’s robots, lasers, lights and secret passageways to explore. Don’t miss out! 朗✨  Get ticket info and more details here: https://bit.ly/DarkSpectrum | Secret Sydney | Facebook
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The huge task of tunnelling deep under the centre of Sydney features tonight on the ABC’s Catalyst. The program explores how the new Sydney Metro tunnels will help transform our public transport system. Tune in to ABC iview at 8.30pm. | Sydney Metro
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194K views · 2.4K reactions | Experts are baffled about a secret set of tunnels under Sydney’s harbour. | 7NEWS Australia | Facebook
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