The River That Built Roman London and Then Disappeared

The Walbrook is barely a mile long. It has been invisible since the fifteenth century. And yet it is the reason Roman London exists where it does. This documentary traces the buried river from its lost springs in Shoreditch to its concrete outfall at the Thames, and reconstructs through archaeology everything it gave, witnessed, and swallowed across two thousand years. The central thesis: a river that shaped the Roman Empire's northernmost city now flows forgotten beneath one of the most expensive square miles on Earth.

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