You might want to spend some time browsing the exhibits at Museum of Wooden Architecture, Kostroma State Historical-Architectural and Art Museum-Reserve, or Museum of Flax and Bark. Explore landmarks like Fire Tower, Trade rows, and Church of the Resurrection in the Grove. You can watch performances at Kostroma Ostrovsky State Drama Theatre, Kostroma Regional Puppet Theater, and Kostroma Chamber Drama Theater if you're interested in local theater.