Here's how to find the carriages
By carDrive along Ring Street to the intersection with Kärntnerstrasse. Next to the Opera is a parking house. Behind the Opera is the very famous Hotel Sacher and the Albertina. And in front of this part of the Imperial Palace are the carriages waiting. Ask one of the drivers for a carriage of Martina Michelfeit.
From the center of town, walk south on Main Street Kärntnerstrasse until you see the Information sign. Next to the Infopoint are the carriages waiting.
Take the #1or #2 ore #4 until Karlsplatz and take the exit Opera. We are on the north west corner behind the Opera next to Albertina.