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Gruta das Cinco Ribeiras

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description Gruta das Cinco Ribeiras Overview

Gruta das Cinco Ribeiras is a volcanic cave system located on the island of Terceira in the Azores archipelago, Portugal. Formed by basaltic lava flows during the region's early geological history, the cave is an accessible lava tube managed as part of the Azores Geopark network. It features a defined main passage that provides examples of volcanic features such as lava shelves, lateral lava channels, and basaltic striations. The cave is open to the public and serves as an educational site for understanding local volcanology.

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Where is Gruta das Cinco Ribeiras?

Gruta das Cinco Ribeiras is on Terceira in the Azores, Portugal, near the coastal parish of Cinco Ribeiras. It is associated with the municipality of Angra do Heroísmo.

How did Gruta das Cinco Ribeiras form?

The cave formed through basaltic lava flows during Terceira's volcanic history, so its passages are lava tubes rather than limestone caverns. Its volcanic structure is part of the geological value recognized by the Azores Geopark network.

Can visitors enter Gruta das Cinco Ribeiras?

The site is known for a coastal cave-diving experience that starts from the Cinco Ribeiras natural pool. The cave includes several interconnected chambers rather than one short cavity. [Azores Tourism](https://turismo.azores.gov.pt/?p=14533)

What should divers expect inside Gruta das Cinco Ribeiras?

Divers can expect connected volcanic chambers in a basaltic cave on Terceira, with the natural pool and coast shaping access. It is also part of the Azores Geopark network, so protecting the passages is part of the experience.

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