When it comes to outdoor adventures in Europe, Slovenia remains one of the continent’s hidden treasures. From vast underground cave systems to wild river canyons, this small country is packed with dramatic natural scenery. For visitors from the UK, it’s an ideal destination for adventure, nature, and unique geological wonders. In this guide, we’ll focus on the caves and canyons in Slovenia—what to expect, what to budget for, and how to make the most of your visit.