I Street Bridge Lets the Hornblower By
I recommend watching this with the volume off, since there's nothing to hear but the river wind, the incessant clanging of the warning bells, and Brent's sudden, violent sneeze (after which I bless him). (Also, it doesn't really get interesting until about the :50 mark, so feel free to skip ahead.)
This is the I Street Bridge in Sacramento, a historic metal truss swing bridge that neither lifts nor draws but actually spins on the most amazing giant iron gear system to get out of the way of boats when the river is high, as it is now. (We compared the Sacramento River's current depth on the scale at Tower Bridge, 23', to the river depth last July when family came to visit: a mere 7'. What a difference some rain makes!) The I Street Bridge is a dual-level affair, carrying vehicle and foot traffic on the top and trains on the bottom. A favorite landmark of mine.