The caves were first explored in January 1938 by speleologist Franco Anelli.
The Grotta Bianca is considered by many geologists to be one of the most brilliant and white caves in the world due to the purity of its alabaster formations.
The air temperature inside the cave system remains remarkably stable throughout all seasons.
The cave system was formed by the erosion of Cretaceous limestone by underground rivers.
The first hall, the 'Grave,' features an open roof allowing natural light to penetrate the initial cavern.
The cavern network spans a total length of approximately 3,348 meters underground.
The Grotte di Castellana is a karst cave system located in the Apulia region of Italy, extending 3 kilometers in total length with a maximum depth of 122 meters. The network consists of a series of interconnected caverns characterized by high-density stalactite and stalagmite formations, culminating in the bright white 'Grotta Bianca' (White Cave). Visitors access the subterranean complex through a natural vertical entrance known as the 'Grave,' which measures 60 meters deep. The site includes the Museo Speleologico 'Franco Anelli,' which documents the history of the caves' discovery in 1938. Tours follow a standardized path through a varied landscape of geological formations formed by centuries of water infiltration. The internal temperature remains constant at approximately 16.5°C year-round with a high humidity level. The complex is maintained and managed for both tourism and scientific research regarding karst environments.
The 'Grave' entrance area, where natural sunlight illuminates the cavern floor from above.
Wear comfortable, non-slip footwear as paths can be wet and uneven.
Bring a light sweater or jacket, as the humidity and temperature are cool even during peak summer.
Book tickets in advance online to secure your preferred tour language and time slot during busy seasons.
Do not attempt to touch the cave walls or formations, as human oils can permanently damage the growth of mineral deposits.
The caves are open year-round, though tour availability and language options may fluctuate based on seasonal visitor volume.
Photography is strictly prohibited inside the caves; maintain a quiet demeanor to respect the sensitive cave ecosystem.
