Algar do Carvao

About

The Algar do Carvão, or “Cave of Coal,” is a spectacular volcanic lava tube located in the heart of Terceira Island, Azores. Spanning roughly 100 metres in length and plunging 90 metres (about 300 feet) below sea level, the cave opens onto a natural lagoon that glimmers with crystal‑clear waters. Its roof is studded with dramatic stalactites – some rising as high as 5 metres – and the interior is illuminated by natural shafts of light that create a surreal, otherworldly ambience. Guided by the Mountaineers Association, visitors embark on a weekly tour during the high season (May – September), descending a 45‑metre vertical entrance to explore the cavern’s intricate passages and the tranquil pool at its base. Beyond its geological wonder, the site offers a living classroom where travelers can witness firsthand the processes that shape the Azores’ volcanic landscape. A prized destination for hikers, geology buff, and families alike, the Algar do Carvão provides a safe, informative experience that combines adventure with education. The cave’s trails are well‑maintained, and a guide explains the local flora, fauna, and the cave’s role in preserving unique endemic species. Venturing into the limestone formations is also a gentle walk suitable for all ages – making it an unforgettable highlight of any Azorean itinerary. Whether you’re a science aficionado, a thrill seeker, or simply seeking a memorable escape into nature’s hidden chambers, this volcanic gem offers a rare glimpse into the island’s fiery past and the remarkable beauty forged by time and stone.

Highlights

• Vast Lava Tube
• Crystal Clear Lagoon
• Impressive Stalactite Formations

Must-See Areas

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