It's hard to believe that this intricate, Victorian-era building was actually a sewage works. So impressive, in fact, was the colourful ironwork at Crossness Pumping Station that it was nicknamed the 'Cathedral on the Marsh'. Built as an antidote to London's 'Great Stink' in the 1850s, the station was in operation right up until the 1950s, when it was decommissioned and eventually deserted.

Tours of the abandoned pumping station are typically on offer, with the Crossness Engines Trust putting on scheduled guided walks and special events. They also welcome pre-arranged private tours for schools, universities, community groups and other organisations.

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