We were lucky to have arrived in Uyuni on the day we did. There are only a couple of trains to the north coming from this dusty frontier town. It's a nice little place which pretty much caters to those leaving or returning from the Salar de Uyuni tours. That being the case, it wasn't hard for us to order a pizza, drink a beer and have plenty of time to catch our 1:30 am train to the north, eventually ending up in La Paz about 11 hours later.