The train is by far the nicest way to get between Hue and Nha Trang.
Bus also run the route, and although cheaper and quicker than
travel by train, the journey is long and the train is much more
comfortable.
Trains
The SE3 daytime train is the best train between Hue and Nha Trang.
The views from the left handside of the train are spectacular on
the section before Danang. The train leaves Hue at 10:44 and
arrives at Nha Trang at 21:47. There are overnight options but
they all leave or arrive early in the morning.