We still have at least one bridge in the UK with buildings - Pulteney Bridge in Bath - https://goo.gl/maps/5DGDvhwEotkz6Kk47

And just one house in Ambleside - https://goo.gl/maps/ray39NX87SPNcPU19

There is something strong and subconscious about crossing rivers. House is safety, river is risk?

On a similar note - If you’ve not seen it, the galata bridge in Istanbul has a boardwalk full of shops on its underside. Very cool.

I remember the same feeling in Witcher 3, exploring the buildings and markets on the big bridges in Novigrad.