Because the castle's name was similar to the nearby "Tobel hunting-lodge" situated in Haselsdorf-Tobelbad, it was renamed as "Karlau", after the archduke.
The railway brought tourists to alpine lake resorts and mineral springs at Rohitsch (today's Rogaška Slatina) and Bad Gleichenberg, the brine springs of Bad Aussee, and the thermal springs of Tuffer (today's Laško), Neuhaus am Klausenbach and Tobelbad.