Available languages
3 hours
Mobile ticket
The underground caves are one of the most amazing visits to take on Terceira Island. This tour includes the passage through the Christmas Cave and the Carvão Algar, also includes the passage through the famous Sulfur Furnas and the leisure area Lagoa das Patas.
IMPORTANT INFORMATION: The Algar do Carvão is temporarily closed for reconstruction works of the museum, instead of the Algar do Carvão we will visit the natural pools of the Biscoitos.
Not recommended for travelers with spinal injuries
Not recommended for pregnant travelers
Not recommended for travelers with poor cardiovascular health
Suitable for all physical fitness levels
For a full refund, cancel at least 24 hours before the scheduled departure time.
Lagoa Das Patas
The first stop of the tour will be at a secret place called Lagoa das Patas. In this place it is possible to visit the stream that originates from Serra de Sta Bárbara, visit the Lagoon and interact with animals such as ducks and some birds. It is a leisure area full of life and nature!
Here we will visit the famous Gruta Natal and Lagoa do Negro. At this stop, you have the opportunity to walk through lava tunnels made by mother nature and see Lagoa do Negro up close.
Pick up & drop off
Personal Accident Insurance
Air-conditioned vehicle
Tourist Guide
Tickets to the Caves (15€)
Select a pickup point
Pickup included
141 reviews
Total reviews and rating from Viator & Tripadvisor
Maryna K,,Dec 21, 2025
- Review from Viator
Such a great tour! The places we stopped at were incredibly beautiful and unique. Andre also shared a lot of interesting info about the island. I can recommend this tour without hesitation!







Vicki W,,Nov 14, 2025
- Review from Viator
A very informative tour of the internal part of Terceira! The Gruta Do Natal (Christmas Cave) was a must see. The waves at the natural pools of Biscoitos were amazing! Our tour guide Carlitas was very knowledgeable and friendly! A great way to spend an afternoon!
rickmU4490YJ,,Oct 27, 2025
- Review from Tripadvisor
Being led by Andre really made it fabulous. Is in a personal skills wonderful a very warm and genuine person. He really brought home the culture island of island.
Maria I,,Oct 3, 2025
- Review from Viator
Very nice experience, we visited areas of Terceira we would have never known about if we travelled on our own. Driver was excellent, super friendly snd knowledgeable . Thank you Jamie
Hao D,,Sep 2, 2025
- Review from Viator
Nice tour, Andre share a lot of info about the island, the volcanos, and how the lava cave formed. Very interesting and informative tour.
RitaC5220,,Aug 29, 2025
- Review from Tripadvisor
Super recommend! Amelia was a great guide, explained everything clearly, was helpful and very friendly from beginning to end.
Resort41890526781,,Jul 29, 2025
- Review from Tripadvisor
Amélia is a sensational guide and provided an amazing, lively, full of information tour. The tour offers a quite varied view of Terceira’s geography, and the weather even made us experience the four seasons of the year in one afternoon. A great way to explore the nature of the island in its most peculiar aspects.
A7612PW ukaszs,,Apr 6, 2025
- Review from Tripadvisor
Exploring the Terceira with James was an unforgettable experience. He guided us through the island's rich history, fascinating caves, and the charming Biscoitos, sharing his immense knowledge every step of the way. James was not only incredibly informative but also exceptionally kind, approachable, and equipped with a fantastic sense of humor. His warm personality and storytelling turned the trip into a truly memorable adventure. Highly recommended for anyone visiting the Azores!
Leah E,,Mar 3, 2025
- Review from Tripadvisor
We had a fantastic tour with Amelia. Despite the weather, which was out of our control, she kept us entertained, taught us a lot about history and geology, and was very accommodating to what we wanted to see and do. I highly recommend this tour.



545olegm,,Oct 16, 2024
- Review from Tripadvisor
The tour was amazing. Algar do Carvão is the must if you visiting Terceira: a unique experience. I don't sure are there other place where you can look at the sky from the inside of volcano. All other destinations were also beautiful, especially the ducks on the lagoon - I didn't expect this in volcano tour. There is a lot of cave photos here already, so I add ducks. Andre is the best guide I ever met. He's very knowledgeable, friendly and told us a lot about the geology and nature of Azores, and also about the local culture and history. I highly recommend this tour for everybody interesting in nature. It definitely worth the price.


Operated by Azores Nature Tours