Historical photos, Aug reality?

https://www.reddit.com/r/Lightbulb/comments/4f81ss/an_app_for_your_camera_that_could_show_what_the/ got me thinking - flickr, others have CC licenced photos of landmarks, it would be interesting to consume those into Mapillary with appropriate date filtering. Any experiments like this been tried?

Ditto mapillary via an Aug reality platform like Layar - interesting to see photos before/after.

Might tinker with API to see how hard it is (specifically delivering mapillary photos over layar’s API)