The train lines U2 (violet) and U3 (orange) intersects at the Volkstheater station. It is one of the cleanest stations in the city - the most picturesque too with displays of features from two of the cities' biggest museums which are nearby and some murals. One of the biggest is “Nature in the Making” (Das Werden der Natur) by Anton Lehmden.
When in Vienna, train stations can be identified by the blue U sign. I've always been confident about Vienna's transportation system, convenient, clean (save for a few with drunkards around) and with information centers all ready to help (for tourists).
If ever you find yourself in the city, try to go around hopping from one train line to another...that's how I'm able to memorize every single train station here. hihi.
