This is the Tesla Coil in our school. It is one of the biggest in Vienna and there are only two of them in Austria. The other one is standing in a museum.
Sadly there were some technical issues so our teacher was not able to show us all the features but I think it is still a good video. You can do many things with this coil, for instance, playing music and so on.
It is one of the coolest rooms in our school.