We previously visited Turaida Castle in Sigulda so check out that post too if you like castles. That one has a really good museum, a great park area, and an interesting castle structure. However, if you want to see a more typical medieval castle, then the 13th century Cēsis Castle is better. The museum isn't as good and the park grounds are smaller, but the castle is really cool to see. Next to the castle is the old town area of Cēsis, which is another great place to hang out. Heck, go ahead and plan on visiting both towns because castles are really cool and Latvia is a great place to live or vacation.