You might want to spend some time browsing the exhibits at Grand Maket Russia Interactive Museum, C-189 Submarine Museum, or Russian Vodka Museum. Narva Triumphal Arch, St. Nicholas' Naval Cathedral, and Saint Petersburg Conservatory are landmarks that you won't want to miss. You can watch performances at Mariinsky Theatre, Alexandrinsky Theatre, and Oktyabrskiy Big Concert Hall if you're interested in local theater.