You might want to spend some time browsing the exhibits at V.V. Barsova Dacha Museum, Friendship Tree Garden Museum, or Sochi Maritime Terminal. Stalin's Villa, Valeriya Barsova's Dacha, and Museum of Sochi Sport Honour are well-known local landmarks worth a visit. You can watch performances at Winter Theatre, Festival Concert Hall, and Hall of Organ and Chamber Music if you're interested in local theater.