You might want to spend some time browsing the exhibits at Sochi Maritime Terminal, V.V. Barsova Dacha 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 Green Theater, Festival Concert Hall, and Winter Theatre if you're interested in local theater.