Ecotechnical Museum

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Lonely Planet review

Prague's former Waste Water Treatment Plant was built between 1895 and 1906 following a design by the English architect WH Lindley. Surprisingly, as the plant was designed to service a city of 500,000 people, it remained in service until 1967, by which time Prague had a population of over a million.

Several steam-powered engines are on display and more are being repaired; there are guided tours of the labyrinth of sewers beneath the building. Once a year, on a weekend in September, all the steam-driven machinery is demonstrated in full working order.