Uploaded February 2026 | Updated September 2026, 2 weeks ago

---

How does a 19th-century railway bridge in Scotland serve as the blueprint for one of the busiest crossings in the world? In this documentary, we explore the incredible engineering of the Howrah Bridge in Kolkata and its "older sister," the Forth Bridge in Scotland.

Subscribe to Spark for more amazing science, tech & engineering videos: goo.gl/LIrlur 🚀

Join the Spark Channel Membership to get access to perks:
youtube.com/channel/UCMV3aTOwUtG5vwfH9_rzb2w/join

You can now become a History Hit member right here on YouTube! Join for access to a new exclusive documentary every week, and access to over 160+ of our documentaries presented by world renowned historians like Dan Snow, Eleanor Janega, Tristan Hughes, Mary Beard, Matt Lewis and more.
Get an exclusive release every week by signing up here: bit.ly/4pyExyn

Any queries, please contact us at: owned-enquiries@littledotstudios.com

#Spark