Bucket List: 18 Incredible Caves (You Can Actually Visit).
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Grotte di Castellana, Italy – Located in Puglia, about 40 kilometres southeast of Bari, the Caves of Castellana combine adventure with artistry in a truly unique way. For cave lovers, there’s up to three kilometres of passageways to explore, showcasing impressive stalactites, stalagmites, galleries and fossils, and ending (if you choose the longer route) in the Grotta Bianca – a vision in bright, white alabaster with crystalline walls and delicate formations. For lovers of the arts, there are multiple monthly performances of Dante’s Inferno, a spectacle of light, sound and dance using the cave’s natural balconies and terraces for a stage.