Only about half the seats are taken as the bus ambles out of Uyuni despite company reps repeatedly bellowing the name of the destination so we think at first that we’re in for a comfortable ride. What we don’t know is that the bus will, in the first few miles, make multiple stops and take on passengers until not only every seat is full but so is the aisle. Not so comfortable after all and not in the same class as Cruz del Sur in Peru, but we’re on our way to Potosi, one of the highest cities in the world. Four hours later a battered old taxi takes us…