About Us

Located on the island of São Miguel, Gruta do Carvão is one of the most remarkable volcanic caves in the Azores. Formed by ancient basaltic lava flows, this unique lava tube stretches beneath part of the city of Ponta Delgada, offering visitors a fascinating journey into the volcanic origins of the archipelago.

As you explore its natural tunnels, you can observe impressive geological formations, including lava stalactites, basalt walls, and structures created by the cooling and movement of molten lava thousands of years ago. The cave provides an immersive experience that helps visitors better understand the volcanic activity responsible for shaping the Azorean islands.

Beyond its geological importance, Gruta do Carvão also plays an important environmental and educational role, promoting awareness of geology, nature conservation, and the preservation of the Azores’ natural heritage.

Visiting Gruta do Carvão is an unforgettable experience — a chance to discover one of São Miguel’s hidden treasures, where nature, science, and volcanic history come together beneath the surface.