This afternoon, train track trek is exactly what we did, in order to walk from Hidro Electrico, to tonight's haunt of Aguas Calientes. It literally was about 3 hours straight of walking either on or right beside the train line that goes (almost) to Machu Picchu. Long, tedious, and a bit risky when we had to jump off the track to make way for an oncoming train. But it got us there.
Got up at 6am this morning, in order to catch a bus, then a train, then a light-rail, to the OSCMS Summit 2007 down in Sunnyvale. The train was the biggest part of the trip (1 hour). the Bay Area's Caltrain is a pretty cool service: high-speed and cheap trains that go everywhere between San Francisco and San José, plus they have bike racks on the trains. The other two legs of my journey — the Muni cable-car bus in San Francisco, and the VTA Light Rail in Sunnyvale — were good fun as well.
Mexico City has an excellent underground train system — one that reminds me very much of Paris's metro. I first caught the metro late at night (on my first night here, with Jackie), and there were few people on the trains, and plenty of room to move about. This gave me the wrong idea as to what catching the metro would be like during the day!