I wonder if it would be possible to generate street view like navigation of the world decades ago by geolocating photos. Could we reconstruct a 1920s city for example?
In popular areas with lots of overlapping photos, something akin to that was possible with PhotoSynth where it joined together matching photos projected into an inferred 3D space. Sadly the service was discontinued a while back.
https://en.wikipedia.org/wiki/Photosynth