Spending New Year's Eve in Vienna. Fin de año en Viena.

Hi there,

I'm from Barcelona and will go to Austria for New Year's visiting first Salzburgh and then spending New Year's Eve in Vienna. Any recommendations on what to do? where to go? important things to take into account? Algún español que vaya a pasar también el fin de año?

Thanks!

Good,
I also coming in austria to spend new year from Pakistan.