Spend the morning taking a guided tour of Postojna Caves, an underground kingdom of caverns, halls and passages. Marvel at the Brilliant, a breath-taking five-metre-tall stalagmite!
OR
Head to the Škocjan Caves, a unique natural phenomenon formed from the dissolving of limestone by the Reka River. With its awe-inspiring stalagmites and stalactites, numerous waterfalls and one of the world's largest underground canyons, this subterranean world has more than earned its place as a UNESCO World Heritage Site.
Emerge back above ground- but not for long! Admire Predjama Castle, a medieval wonder perched in the centre of a 123 metre-high cliff face, before descending into its network of secret tunnels below. It's the largest cave castle in the world.
Transfer to Ljubljana and check in to accommodation.