Pont y Cafnau 2024

Located just below the confluence of the Afon Taf Fawr and the Afon Taf Fechan rivers, it is now used as a public footpath. This cast iron aqueduct (1793), known as the ‘bridge of troughs’, was an early prototype and is a unique survivor, and has been acknowledged as the world’s oldest surviving iron railway bridge. It was built by the chief engineer of Cyfartha Ironworks to carry the works’ tramline and its water supply over the River Taff. The bridge is a Scheduled Ancient Monument and Grade II Listed structure.


Address: Cyfarthfa Merthyr Tydfil Merthyr Tydfil

  • Telephone: 01685 727 492
  • Email: .(JavaScript must be enabled to view this email address)
  • Website: View website

Open Days & Times

Access at all times.


  • By Rail: Merthyr Tydfil / 1 mile


  • Souvenir Shop

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