Santadi - Monuments Grotte Is Zuddas The Caves are located in the southwestern part of Sardinia. The cavity is formed by dolomite rocks dating back about 530 million years ago. The cave was discovered by cavers in 1971, has a constant temperature of 16 degrees and the humidity is close to 100%. Today they are open to the public and you can visit several rooms, each of which stands out for the peculiarity of its concretions.