SAPA, VIETNAM - All I knew was that the cable car was now running. I did not plan to take it, let alone imagine that it might prove the highlight of my trip. My guidebook scorned the venture, saying it would relay more people in an hour to the top of Vietnam’s highest point, Mount Fansipan, than the number of climbers who summit it in an entire year. With the cable car, the guidebook said, “the appeal of standing alone on a remote peak” would no longer be an option.