Tower Bridge, not London Bridge

Apparently that beautiful Gothic-style bridge is Tower Bridge, not London Bridge. And it has never fallen down for that matter.
We took a tour across the car deck, up one tower, back across both enclosed bridges at the top, and down the other tower to the engineering system that raises and lowers the arms. We now know all about bascule bridges, counterbalancing, and hydraulic steam accumulators. That's what you get when you take an engineer on vacation.