The Architecture the Railways Built is a British factual documentary series presented by the historian Tim Dunn, first broadcast in the United Kingdom from 28 April 2020 on Yesterday.

Each episode explores railway sites across the UK and Europe, including historical, abandoned, modern and future elements.

The series is a UKTV original, commissioned for Yesterday and produced by Brown Bob Productions.

Following its success, Secrets of the London Underground, a programme of four series presented by Dunn, was broadcast from 2021.

This article relating to a non-fiction television series in the United Kingdom is a stub.