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There is a magical effect created by the sunlight passing through the opening of this huge cave system.
The fantastic Castellana Caves (Grotte di Castellana) is one of the largest cave systems in Italy and stretches for over two miles with many areas still unexplored. The underground tunnels are a natural marvel not to be missed in Puglia, full of strange and stunning geological formations illuminated in a rainbow of colors as the sun moves through the sky. The only cave of this speleological complex connecting with the outside is the massive La Grave, which is 330 feet long, 170 feet wide, and 200 feet deep. La Grave creates a huge natural pantheon with its opening that lets the sunlight pass through, creating a magical effect where the light moves differently according to the time of day and the season.
