Interesting museums in Turkey include:

The city of Turku is not very big, but it has many museums. If you are interested in museums, you can visit several of them within three days, and some of them are quite unique!

A very distinctive castle, originally built in the 13th century during the Swedish dynasty. The current appearance of the castle dates back to the 1500s.
There are three parts. 1. Maria Prymachenko's personal exhibition. Be amazed by the color schemes of this self-taught artist. 2. An introduction to the ruins of former street houses, offering a glimpse into the old streets of Turku. 3. Some modern paintings. Opening hours are from 11 AM to 7 PM, and there are a few colorful floating penguins on the Aura River at the entrance.
Recreates the appearance of Turku in the 1800s. This place survived the Great Fire of Turku in 1827.
Two floors: the first floor features special exhibitions of modern art, and the second floor showcases works by Finnish local artists. The museum building itself is also very distinctive. Opening hours: 11-19; closed on Mondays.