Did you know it's not actually/formally called the Forth 'Rail' Bridge but just the Forth Bridge? The word 'rail' has often been inserted to distinguish it from the Forth Road Bridge (sic) which is/was called just that, the 'road' bridge (now superseded by the new Queensferry Crossing). Anyhow, just a little known fact
I walked south toward the bridge and turned left (east) walking under the bridge. In the 40+ year I've lived here, I never would have thought it likely to do.