Fodor's Expert Review Papuk Nature Park

A paradise for hikers, bikers, and nature enthusiasts, Papuk Nature Park was the first geopark in Croatia to be recognized by UNESCO for its geological, biological, and cultural diversity. Within its 336 square km (129 square miles) are beech, oak, and fir forests, fresh rivers, lakes, and waterfalls, along with hiking and biking trails, swimming spots, and a ropes course. There are also archaeological sites from the Sopot and Starčevo cultures (5500–3500 BC), as well as Ružica Grad, an abandoned medieval castle that was built in the 15th century during Hungarian rule; it can be reached by hiking 15 minutes uphill from Lake Orahovica. The lakes and Ružica Grad can be reached in 30 minutes from Kutjevo. Guided tours can be arranged from the visitor center (ask your hotel to call in advance to organize).