@amazeifystore: Ever wonder how you breathe inside a 2-mile underwater tunnel? 🌬️ Ole Singstad realized that pushing air from end to end would never work for the Holland Tunnel. Instead, he designed a massive concrete lung that allows the tunnel to breathe through its floor and ceiling. This transverse system pulls out exhaust before it even reaches your window. What other hidden engineering marvels keep our cities running? Let us know below! 👇 #engineering #hollandtunnel #nyc #infrastructure #civilengineering #howitworks #urbanplanning #hiddennyc #tunnels #History #Tech #citysecrets

Jerry

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Region: US

Monday 03 August 2026 16:50:50 GMT