These aerial photo mosaics shot over DC in the early 20th century are incredible.
Aerial photographic mosaic map of Washington, D.C., Sept 13, 1922
Aerial photographic mosaic, Washington, D.C., 1918
It is striking to me just how built-up the city has become over the last one hundred years. Looking at the mosaic from 1922, I’m not certain there is a bridge across Canal Rd. at the future site of Arizona Ave. It appears there is only the bridge across the Canal. Perhaps there was a smaller bridge there? My sources are not clear. More research is in order!