Castellana Grotte is a charming city located in the Bari Province of the Apulia region in southern Italy. Nestled amidst the picturesque countryside, this city is renowned for its stunning natural beauty and fascinating underground caves. The city takes its name from the impressive Castellana Caves, which are considered one of the most important speleological sites in Italy. These caves are a true wonder of nature, with a labyrinthine network of tunnels, chambers, and stalactite formations that have been formed over millions of years. Visitors can embark on guided tours to explore the caves and marvel at the breathtaking natural formations.