# Grotta di Nettuno Neptune's Grotto

- **Country:** Italy
- **Access:** Public
- **Length:** 4,000 m
- **Geology:** Sea cave
- **Website:** [http://www.algherosardinia.net/neptunes-grotto.html Grotte di Nettuno]
- **Location:** Capo Caccia, Alghero (SS, Sardinia, Italy)
- **Elevation:** 5 m
- **Show Cave:** 1959
- **Other Name:** Coves de Neptú
- **Photo Caption:** Inside the cave
- **Entrance Count:** 1
- **Show Cave Length:** 500 m

The combined length of the cave system is estimated to be around , but only approximately are accessible to the public. Inside are passages of lit stalactite and stalagmite formations, and a long saltwater lake, which is at sea level. The cave was once a habitat for the Mediterranean monk seal, which has become extinct in the area.

![Photo of Grotta di Nettuno Neptune's Grotto](https://upload.wikimedia.org/wikipedia/commons/3/37/Grotta_di_nettuno_sardinien.jpg)

**Source:** https://en.wikipedia.org/wiki/Neptune's_Grotto (Wikipedia, CC BY-SA)