March, 1930. Eighty-six thousand bridges are in use in Helobiae.
Around 1500. The world population is confined in eight cities: Helobiae, Tokyo, Marmara, Hong Kong, Artemisa, Hackensack, Goa, Antananarivo. Few, if any, are believed to be living in the forest.
helobiae 
This resonates a little with THE YEARS OF RICE AND SALT by Kim Stanley Robinson. It tells an untold history.
I’ll check it, thank you.
I like the angle of view on your picture. Great!