Serbia

Kalemegdan Fortress, symbol of Belgrade's strength, where the Sava meets the Danube: its history, the park and the best time to visit.

Plitvice Lakes National Park, a UNESCO site for every season: turquoise lakes in summer and frozen waterfalls in winter.

Kotor, Montenegro, on the Adriatic's largest bay: the Old Town, baroque Perast, the Lovćen and Orjen mountains and the best time to visit.

Postojna Cave, one of Slovenia's top attractions: 24 km of underground passages, the Great Hall and the Concert Hall, on a guided tour for all ages.

What to do in Split, Croatia: Diocletian's Palace, the old streets, markets and coastal views, plus the best time to visit in spring or autumn.

Zlatibor in Serbia: golden pine forests, sunny skies and a healing climate, with tips for visiting in spring or autumn on a Balkan tour.

The Visoko pyramids in Bosnia and Herzegovina, found by Semir Osmanagić: the Pyramid of the Sun, the theories behind them and when to visit.

Taste traditional Balkan food on a guided tour: hearty meats, fresh vegetables and each country's specialities, with the best season to go.

Medieval Počitelj in Bosnia and Herzegovina: the fortress, the Hadži-Alija Mosque and a unique mix of Mediterranean and Ottoman influences.

A Balkan tour through the most beautiful national parks, including Durmitor and Plitvice Lakes, with hiking, rafting and the best seasons to go.

Why visit Zagreb on a Balkans tour: historic Kaptol, Dolac Market and the Franciscan Monastery, plus the best time to go in spring or autumn.