You might want to spend some time browsing the exhibits at Bunker-42 on Taganka, Retro Auto Museum, or New Tretyakov Gallery - Museum of Modern Art. Shukhov Tower, Palace of the Romanov Boyars, and Spasskaya Tower are notable landmarks to explore if you're in the area. You can catch a show at Moscow International House of Music, Taganka Theatre, and Theater of Russian Drama.