I had a long overnight in SFO and the weather was amazing.  I saw the building where I first interviewed with Cathay, road the trolley, saw the wharf, and enjoyed some great views.  You can see: how the trolleys turn around at the end of the line, Sourdough, the cables and pulleys that pull the trolley’s along the streets, the underground transfer wheels that change the cable’s direction by 90 degrees, the wooden brakes the trolleys use, Lombard St. -- the most curvy street in the world, a famous prison, and more . . .