Gruta do Carvao

The Gruta do Carvão, or Charcoal Cave, is a natural monument and one of the most important volcanic cavities in the Island of São Miguel. It features a variety of geological aspects, structures, and phenomena caused by volcanic activity, including 'gas bubbles', cracks in the walls and ceiling, and countless stalactites on the ceiling. The cave has a Visitors' Center and offers guided tours, allowing visitors to explore one of its sections. The Gruta do Carvão is a significant location for understanding and interpreting basalt volcanism on the island of São Miguel