The Grotte di Castellana are a series of impressive limestone caves located in the Apulia region of southern Italy. Discovered in 1938, these caves stretch for about 3 kilometers and feature stunning stalactites, stalagmites, and unique rock formations. The caves are a popular tourist destination, attracting visitors with their natural beauty and geological significance. Visitors can explore the caves through guided tours that showcase the most remarkable sections, including the famous White Cave and the Great Hall. The temperature inside the caves remains cool year-round, making it a refreshing escape during the hot summer months.