San Francisco, California
Saturday 25 June - the San Francisco Cable Cars are a truly remarkable feat of engineering with cables running several miles driven at a steady 9 miles per hour from a single engine room, and individual cars clamping onto and releasing the cables as they make their progress through town. They can pull up to 10 tons per car with numerous cars running at once - and all planned, laid out and running getting on for a hundred years ago by a man from London.
Alcatraz ...