Once upon a time, rivers ran freely through every industrial city as an integrated part of the city's infrastructure. Houses were built alongside the banks. The stream provided energy to mills and factories. But as the cities grew, the rivers became so polluted that they turned into carriers of deadly diseases, from the plague to cholera. The solution back then was to bury the rivers under the cities and merge them with the sewer systems where they have been forgotten - until now! 'Lost Rivers' takes us on an adventure into and through a city's interior, and tracks the history of the lost urban rivers by leading us on a journey guided by underground 'urban explorers'. We are taken down to the dark underground depths of both Toronto, London and New York, and are given an introduction to why so many activists, urban planners and artists are so obsessed with reuniting us with the city's original lifeblood.

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