Tulln an der Donau is a city in Lower Austria.
Tulln has two train stations:
S40 and other regional train makes Tulln easily reachable from St. Pölten and Vienna. With as many as two trains per hour on workdays, S40 is a good choice if you want to hop on in Klosterneuburg and small towns on the way. Regional Express (REX) trains are less frequent, but faster, since they don't stop at small stations. The Danube river is within visible range on a major part of the route from Vienna.
Unlike mega-cities such as Vienna, Tulln is very suitable for walking and biking. A alternative method is taking the bus 440.