Grutas Subterrâneas (Meio Dia) | Ilha Terceira

Terceira Underground Tour Uncovers the Island's Volcanic Secrets

Beneath the lush landscapes of Terceira Island lies a remarkable underground world shaped by volcanic activity over thousands of years. This guided excursion invites visitors to explore some of the island's most fascinating geological attractions, offering an unforgettable journey through ancient lava formations and unique natural environments. The experience combines scenic landscapes with educational insights, making it an excellent choice for travelers eager to discover a different side of the Azores.

One of the highlights of the tour is a visit to the impressive Natal Cave, where visitors walk through ancient lava tubes formed during past volcanic eruptions. The journey also includes the famous Sulphur Furnas, where volcanic gases and geothermal activity reveal the powerful natural forces that continue to shape the island. A relaxing stop at the peaceful Lagoa das Patas leisure area offers a welcome contrast, surrounded by tranquil scenery and lush vegetation.

As Algar do Carvão is temporarily closed for museum reconstruction, the itinerary has been thoughtfully updated to include a visit to the spectacular natural pools of Biscoitos. Formed by volcanic lava flows along the coastline, these crystal clear pools provide stunning views of the Atlantic Ocean and showcase the dramatic beauty of Terceira's rugged shoreline. The alternative stop ensures visitors continue to experience one of the island's most iconic volcanic landscapes.

Throughout the excursion, knowledgeable guides share fascinating stories about Terceira's geological history, volcanic origins, and natural heritage. From underground lava passages to scenic coastal formations, every stop highlights the island's extraordinary relationship with nature. Blending adventure, education, and breathtaking scenery, this tour offers an enriching experience that reveals the hidden wonders beneath the surface of Terceira Island.