Istria is one of Croatia’s hidden gems. What’s not to love about rolling hills, fertile plains, and hilltop villages? Istria makes up Croatia’s northwest peninsula, bordering Slovenia, and largely surrounded by the Adriatic Sea’s crystal clear waters. Because of its proximity to Italy, the strong Roman and Venetian influences have shaped Istria’s unique culture. Visitors to Istria will also enjoy smaller crowds compared to Dalmatia.