WhatWasThere is an excellent web tool and mobile app that uses Google Maps technologies to provide users with an interactive experience through which they get to learn how different places looked in the past. It’s like a virtual time machine that takes you in a journey in space and time. When you install WhatWasThere on your iPad or iPhone and once it is launched, the app will detect the geographical location where you are and will provide you with any historic photographs that were captured nearby plotted on a map! You can also switch into Camera view to get an augmented reality experience of the history that surrounds you.’
Historic photographs found on WhatWasThere come in with source information and more details to help you Google Street view it. You can also use the ‘Explore Photos’ feature to search for historical photographs related to any place in the map. You simply select the location you are interested in and you will be able to see the historic imagery available for that place.WhatWasThere is still a work in progress and much content is still lacking. But users can help by adding photographs to the map. The upload feature is available only for registered users. Registration is totally free.