You might want to spend some time browsing the exhibits at V.V. Barsova Dacha Museum, Sochi Art Museum, or Nikolai Ostrovsky Literature Memorial Museum. Stalin's Villa, Museum of Sochi Sport Honour, and N. Ostrovskiy Literary Memorial Museum are well-known local landmarks worth a visit. You can watch performances at Winter Theatre, Hall of Organ and Chamber Music, and Festival Concert Hall if you're interested in local theater.