Yes, that's the palace where the infamous Rasputin was killed. It's definitely worth visiting. It is the more impressive when you realise that it belonged to a non-imperial family. The luxury and the wealth comprised in one not-so-big house is stunning. And no wonder - the Yusupofs were reacher than the Romanovs! Audio guide is included into the ticket price, but attention! If you want to see the room in the basement where the assasination is believed to happen- you need an extra ticket!
embankment river Moyka, 94, Sankt-Peterburg, Leningradskaya oblast', Russia, 190031