Grotte di Nettuno, Sardinia, Italy Alghero

This is a place you should visit at least once in your life: the only way to truly admire the beauty of this place and perceive its charm is in person. Neptune’s grotto is one of the largest marine caves in Italy and one of the most captivating gems of nature in the Mediterranean. The grotto was formed about two million years ago: inside, you will see rooms with astounding karst formations, a white sandy beach and a huge underground lake… sardegnaturismo.it