Hear the stories of Postojna during a Croatia tour

Travellers taking Croatia tours that feature trips to Slovenia this year can visit the Postojna Cave.

Highlighting the experiences on offer to travellers in the central European country, the Slovenian Tourist Board revealed that the network is celebrating almost 200 years as a visitor attraction, but continues to 'offer new stories'.

The system of caves comprises some 20km of dripstone passages and chambers, into which tour guides have led more than 33 million guests over the past two centuries.

It is one of the most popular tourist caves in Europe and boasts a number of unique features.

Other experiences on offer to people crossing the border into Slovenia during Croatia tours include visiting the capital city ofLjubljana, which is famous for its nightlife and attractions including a historic castle.

Balkan road trips also provide the opportunity to explore several popular Croatia holiday destinations, such as Split, Zagreb, Rijeka and the islands of Krk and Pag.