6Tallinn, Estonia
Tallinn, the capital of Estonia, boasts one of the best-preserved medieval old towns in Europe. The cobblestone streets, fortified walls, and medieval buildings create a captivating atmosphere. The Town Hall Square, with its Gothic Town Hall and colorful merchant houses, is the heart of the old town. Visitors can explore the Toompea Castle, now home to the Estonian Parliament, and the Alexander Nevsky Cathedral, a stunning example of Russian Orthodox architecture.