Neptune's Grotto (Grotta di Nettuno)
Porto di Alghero banchina Garibaldi, 07041 Alghero Driving directions
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Opening hours

Apr-Oct: 9am-7pm (6pm mid Sep-early Oct); Nov-Mar 10am-3pm


Discovered in the 16C by fishermen, a 600m circuit of the cave has been open to visitors since 1954. Whatever the season, the temperature remains between 18 and 20°C. The water that penetrates the cavity forms the Lago Lamarmora, which at 100m long is one of the largest saltwater lakes in Europe. Light infiltrates at a single point in the cave; and there cave flora turn the walls green. After 153 steps, you reach the different chambers of the cave, named after the weird and wonderful shapes of their concretions (Christmas tree, basilica dome, organ).


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Things to see and donearby

Where to sleepnearby

  • Fabulous8.8
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    4.93 Km - Località Porto Conte, 07041 Porto Conte
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    5.75 Km - Via delle Palme 51, 07041 Alghero
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Where to eatnearby

  • From €50 to €65
    Al Tuguri
    MICHELIN 2022
    13 Km - via Maiorca 113/115, 07041 Alghero
  • From €45 to €130
    Il Pavone
    MICHELIN 2022
    13.1 Km - piazza Sulis 3/4, 07041 Alghero

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