The opportunity to visit a lava tunnel in São Miguel is a truly unique experience that should not be missed. The Gruta do Carvão, recognized as a Regional Natural Monument, offers visitors the chance to explore a fascinating volcanic geological formation in the Azores. This impressive lava tunnel, the largest on the island, stretches for 1,912 meters and is divided into four distinct sections.
History and Formation
First, it’s important to note that the formation of Gruta do Carvão dates back between 5,000 and 12,000 years ago. According to historical records, it is believed that the lava tunnel originally extended approximately 5 km, from the coast to the region where the volcanic lava emerged. However, today, only part of this extension is open to the public.
Geological Features
While exploring the interior of the tunnel, visitors encounter a variety of remarkable volcano-speleological features, including:
Lava stalactites and stalagmites
Secondary stalactites
Lateral balconies
A lava bridge
Striated walls
Gas bubbles
Overlapping tunnels
These formations highlight the importance of Gruta do Carvão in the study of basaltic volcanism on São Miguel, making the visit not only a tourist activity but also an educational experience.
Visit Options
For those wishing to visit this lava tunnel in São Miguel, there are two guided tour options:
Short Visit: Lasting 30 to 45 minutes with an easy level of difficulty, this option is ideal for the general public and covers 200 meters of the cave.
Long Visit: Lasting 2 to 3 hours with a moderate difficulty level, this tour is designed for those with an interest in speleology and covers 1,000 meters of the tunnel.
Important Notes
Please note that due to stairs and uneven terrain inside the cave, Gruta do Carvão is not accessible to people with reduced mobility.
Booking
Advance booking is required to ensure your visit. When booking, indicate whether you prefer the guided tour in Portuguese or English. To check available days and times, click here: grutadocarvao.amigosdosacores.pt
In conclusion, visiting a lava tunnel in São Miguel is an unmissable opportunity for geology and nature lovers. This experience allows visitors to dive into the volcanic history of the Azores, offering a fascinating perspective on the island’s formation.
And while you’re still in Ponta Delgada, why not take a guided tour of the island’s capital and learn more about its history and culture?
• By electric bike
• On foot
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