Above the top rail of the fence, above the orange road works fence, the grey structure, is the bridge I cross every day. It's a footbridge across the Manchester Ship Canal. In the photo it's crossing the canal. It rotates 90 degrees to allow the ships through the locks. One can cross the canal over the lock gates then. Scary! Especially in a high wind.
In the background, the cantilever structure, is a high level bridge carrying the railway (Manchester to Liverpool) over the locks.
The roadworks fence is because the canal bank has collapsed and they're fixing it. It's only been there about 120 years! Pah!