Neptune Caves

The Neptune Caves (French: Grottes de Neptune), also known as the Grottes de l'Adugeoir are a series of natural caves near Petigny in the municipality of Couvin, Belgium. They are located on the Eau Noire river, a tributary of the Meuse.

Many of the chambers are accessible to the public via a guided tour, partially via boat on the underground river.[1][2]


  1. "Grottes de Neptune, dites Grottes de l'Adugeoir". Retrieved 2017-02-20.
  2. "Caves of Neptune (or of Adujoir)". Michelin. Retrieved 2017-02-20.

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