The Green Cave is located on the Capo Caccia Promontory, in the Capo Caccia Regional Natural Park. Approximately 20 km from Alghero, accessible by car, it is near the famous Neptune's Cave. The Green Cave's distinctive feature is its emerald green rock walls, home to stalactites, stalagmites, and evidence of the Neolithic period. Reopened in July 2025, it is accessed via a steel staircase of 860 steps.