TUNNEL DU BASSIN BLEU
Natural site
2025
Recommended
2025
The Bassin Bleu tunnel, created by the volcanic activity of the Piton des Neiges, is Réunion's oldest lava tunnel (over 450,000 years old). Located just a few kilometers from the lagoon, it is one of the only tunnels in the west of the island, and the most interesting for its length (around 500 m) and diversity. Its geological interest and observable fauna, including colonies of Mascarene salanganes in the tunnel and birds (bitterns, moorhens) in the basin, with a small zip-line at the exit, make it a popular family outing.
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