5PLOVDIV, BULGARIA

Plovdiv is often regarded as Europe’s oldest continuously inhabited city, with evidence of settlements dating back to around 6000 BC. Situated in southern Bulgaria, Plovdiv boasts a rich history that is influenced by the cultures of Thracians, Roman, Byzantines, and Ottomans.
Notable landmarks include the well-preserved Roman theater and the charming Old Town with its colorful 19th-century houses.