--- title: What's Under Your Feet in New York City? link: https://www.youtube.com/watch?v=Iclf_JnPkKw source: youtube-com-practicalengineeringchannel published: 2026-07-21T13:02:12Z updated: 2026-09-03T11:43:09Z first_seen: 2026-09-08T10:17:10.166315Z authors: - Practical Engineering summary: |- A tour of the subsurface in NYC ⚙️ Check out SendCutSend for custom parts fabricated from your CAD: http://sendcutsend.com/practicalengineering Errata: At 8:00, winding are showing a step-up transformer and should be swapped. The underground of New York is almost a city within a city. We kind of get used to having all these utilities and services that it’s easy to forget the physical space they all take up and the work that goes into installing and maintaining them. Watch this video ad-free on Nebula: https://nebula.tv/videos/practical-engineering-whats-under-your-feet-in-new-york-city Signed copies of my book (plus other cool stuff) are available here: https://store.practical.engineering/ Practical Engineering is a YouTube channel about infrastructure and the human-made world around us. It is hosted, written, and produced by Grady Hillhouse. We have new videos posted regularly, so please subscribe for updates. If you enjoyed the video, hit that ‘like’ button, give us a comment, or watch another of our videos! CONNECT WITH ME ____________________________________ Website: http://practical.engineering Twitter: https://twitter.com/HillhouseGrady Instagram: https://www.instagram.com/practicalengineering Reddit: https://www.reddit.com/r/PracticalEngineering Facebook: https://www.facebook.com/PracticalEngineerGrady​ Patreon: http://patreon.com/PracticalEngineering SPONSORSHIP INQUIRIES ____________________________________ Please email my agent at practicalengineering@standard.tv DISCLAIMER ____________________________________ This is not engineering advice. Everything here is for informational and entertainment purposes only. Contact an engineer licensed to practice in your area if you need professional advice or services. All non-licensed clips used for fair use commentary, criticism, and educational purposes. SPECIAL THANKS ____________________________________ This video is sponsored by SendCutSend. Stock video and imagery provided by Getty Images, Shutterstock, Pond5, and Videoblocks. Video by Grady Hillhouse Edited by Wesley Crump Produced by Ralph Crewe Graphics by Nebula Studios MUSIC CREDITS ____________________________________ Himalayan Spell from Epidemic Sound Keyless Entry from Epidemic Sound Water and Light composed by Caleb Winters (https://beacons.ai/calebwinters) Tapped Out from Epidemic Sound Woodland Expedition composed by Caleb Winters (https://beacons.ai/calebwinters) Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License Source: https://www.youtube.com/watch?v=U6fBPdu8w9U content: extracted html: 2026-07-21-what-s-under-your-feet-in-new-york-city.html preview: file: 2026-07-21-what-s-under-your-feet-in-new-york-city.preview-c5bbaed33ae5.webp width: 256 height: 192 color: '#60534f' images: - source: https://i.ytimg.com/vi/Iclf_JnPkKw/maxresdefault.jpg original: file: 2026-07-21-what-s-under-your-feet-in-new-york-city.image-9d7ded3cdf21.jpg width: 1280 height: 720 variants: - file: 2026-07-21-what-s-under-your-feet-in-new-york-city.image-595c6c89ab72.webp width: 48 height: 27 color: '#766966' extra: thumbnail: https://i2.ytimg.com/vi/Iclf_JnPkKw/hqdefault.jpg --- A tour of the subsurface in NYC\ ⚙️ Check out SendCutSend for custom parts fabricated from your CAD: http://sendcutsend.com/practicalengineering Errata: At 8:00, winding are showing a step-up transformer and should be swapped. The underground of New York is almost a city within a city. We kind of get used to having all these utilities and services that it’s easy to forget the physical space they all take up and the work that goes into installing and maintaining them. Watch this video ad-free on Nebula: https://nebula.tv/videos/practical-engineering-whats-under-your-feet-in-new-york-city Signed copies of my book (plus other cool stuff) are available here: https://store.practical.engineering/ Practical Engineering is a YouTube channel about infrastructure and the human-made world around us. It is hosted, written, and produced by Grady Hillhouse. We have new videos posted regularly, so please subscribe for updates. If you enjoyed the video, hit that ‘like’ button, give us a comment, or watch another of our videos! CONNECT WITH ME\ \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\ Website: http://practical.engineering\ Twitter: https://twitter.com/HillhouseGrady\ Instagram: https://www.instagram.com/practicalengineering\ Reddit: https://www.reddit.com/r/PracticalEngineering\ Facebook: https://www.facebook.com/PracticalEngineerGrady​\ Patreon: http://patreon.com/PracticalEngineering SPONSORSHIP INQUIRIES\ \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\ Please email my agent at practicalengineering@standard.tv DISCLAIMER\ \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\ This is not engineering advice. Everything here is for informational and entertainment purposes only. Contact an engineer licensed to practice in your area if you need professional advice or services. All non-licensed clips used for fair use commentary, criticism, and educational purposes. SPECIAL THANKS\ \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\ This video is sponsored by SendCutSend.\ Stock video and imagery provided by Getty Images, Shutterstock, Pond5, and Videoblocks.\ Video by Grady Hillhouse\ Edited by Wesley Crump\ Produced by Ralph Crewe\ Graphics by Nebula Studios MUSIC CREDITS\ \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\ Himalayan Spell from Epidemic Sound\ Keyless Entry from Epidemic Sound\ Water and Light composed by Caleb Winters (https://beacons.ai/calebwinters)\ Tapped Out from Epidemic Sound\ Woodland Expedition composed by Caleb Winters (https://beacons.ai/calebwinters)\ Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License\ Source: https://www.youtube.com/watch?v=U6fBPdu8w9U