Neptune's Grotto, Sea cave in Alghero, Italy.
The cave system extends over 2770 meters beneath Capo Caccia promontory, featuring limestone formations and a large saltwater lake called Lamarmora.
A local fisherman discovered the cave entrance in the eighteenth century, but visitors could only access it by sea until the Escala Cabirol staircase construction in 1959.
The grotto takes its name from Neptune, the Roman god of the sea, and contains numerous geological formations including stalactites and stalagmites in multiple chambers.
Visitors can reach the cave through a 654-step staircase carved into the cliff or by taking a boat trip from Alghero port during favorable weather conditions.
The cave complex includes an underwater section with additional caverns, forming a submerged karst system where the largest chamber is called Nereo Cave.
Location: Alghero
Website: https://grottadinettuno.it
Address: 07041 Alghero, Province of Sassari, Italy 07041
Opening Hours: Monday-Sunday 09:00-19:00
Phone: +393457418361
Website: https://grottadinettuno.it
GPS coordinates: 40.56484,8.16026
Latest update: May 27, 2025 13:12
The Italian cave systems feature geological formations and underground landscapes. The grottos display stalactites, stalagmites, and prehistoric rock paintings. Many caves are accessible through footpaths or boat tours. The karst caves present natural tunnels, vaults, and subterranean rivers. Several grottos are located on the coast with sea access.
Italy contains historical sites away from regular destinations. Cliffs host villages, ancient ruins mark the landscape and monasteries hide in nature. Underground Roman houses, cave churches with frescoes and medieval gardens document history. The architecture and culture of different periods unite at each location.
Sardinia combines ancient Nuragic structures, prehistoric tombs and natural landscapes. The island features Roman temples, Byzantine churches, caves with stalactites and sandy beaches. The interior shows mountain passes, gorges and springs, while the coast presents coves and lighthouses.
These locations across Sardinia include ancient ruins, natural springs, underground tombs, caves with stalactites, wall murals, prehistoric cult sites, lighthouses, beaches, and geological formations. The sites present regional history from prehistoric to modern times.
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