The National Library of Scotland has poked its nose south of the border to build a clever mapping tool that charts the history of London, letting viewers peel away time like the layers of a rotten onion to see how the city's streets have changed over the years.
729 Ordnance Survey maps from between 1891 and 1895 have been "mashed up" for the service, which lets you view Google's current day satellite imagery in one layer, with the ghostly remnants of London's industrial past appearing in a transparent OS map layer above. Was your house once an asylum or a coal works or an abattoir? Find out here. [Standard]