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Mobile ticket
ATT: Algar do Carvão will be closed from Oct 19th 2024 to unkown date as of now, during this period we will be showing a hidden lava tube instead.
On this tour you will visit Algar do Carvão which is classified as a Natural Monument, the Christmas cave, the smoke holes (furnas do enxofre).
Specialized infant seats are available
Service animals allowed
Not recommended for travelers with poor cardiovascular health
Travelers should have at least a moderate level of physical fitness
Children must be accompanied by an adult
* Algar do Carvão will be closed from Oct 19th 2024 to unknown date as of now
During this period we will be showing a hidden lava tube instead. *
For a full refund, cancel at least 24 hours before the scheduled departure time.
Hotel pickup and drop-off
Will pick up anywhere as long as specified
Entrance at the Gruta do Natal
Angra Marina Hotel
Rua De Sao Joao 55 Angra do Heroismo Portugal
Atlantida Mar Hotel
Boavista 9, Praia da Vitoria Portugal
Hotel Do Caracol
Estrada Regional No. 1 Angra do Heroismo Portugal
Porto das Pipas
Porto da Praia da Vitoria
Azoris Angra Garden - Plaza Hotel
Praca Velha, Angra do Heroismo Portugal
Terceira Mar Hotel
Portoes de Sao Pedro, 1 Angra do Heroismo Portugal
Gruta do Natal
It is a very extensive geological formation, resulting from the formation of a lava tube in the interior of the island, included in the Serra de Santa Bárbara and Mistérios Negros Natural Forest Reserve.
Furnas do Enxofre
Furnas do Enxofre is located in the parish of Porto Judeu, in the Municipality of Angra do Heroísmo, on the island of Terceira, in the Azores. They constitute a fumarolic field, that is, an area that comprises several outlets of aggressive volcanic gases, at different temperatures, some quite high.
Pickup included
Pickup included
Pickup included
41 reviews
Total reviews and rating from Viator & Tripadvisor
J4129QMmonikac,
Oct 26, 2025
- Review from Tripadvisor
It was a great tour, even if the weather didn't play along. The sightseeing list included the Gruta do Natal, the Furnas do Enxofre fumarole field and an impromptu drive to a small lagoon. Algar do Carvão was unfortunately not a program item as it was still closed. Our guide had a lot to tell and we had a lot of fun.





John H,
Oct 14, 2025
- Review from Viator
Bernardo picked us up promptly from our VRBO and gave us several options on our itinerary as it was raining. We saw things and learned about the island in ways that I would not have learned had we not taken this tour. Disappointed that the highlight cave was closed but we knew that in advance of booking. Highly recommend the tour and Bernardo
Pam S,
Sep 29, 2025
- Review from Viator
We had a fantastic time. . Our guide was Amazing and so knowledgeable and very helpful along with fun!
julia blackbird,
Sep 19, 2025
- Review from Tripadvisor
An extremely interesting tour, Bernardo took us to some very evocative ‘secret’ caves. He was able to convey all his enthusiasm in explaining the island to us on a lovely afternoon (despite the adverse weather). Recommended!
Sameer P,
Aug 30, 2025
- Review from Viator
It was a wonderful experience on this tour. Our guides Dora and Bernardo were knowledgable, enthusiastic and professional. We had a chance to interact with Dora, who drove the Jeep, is passionate about the island and its culture. Note that the drive to the caves is in a jeep. If you sit in the back seat, be prepared by a bumpy ride on unpaved roads. Also the lava tube at Biscoitos may be demanding for those with restricted mobility. Other than that, it is great tour.




Natacha S,
Aug 28, 2025
- Review from Viator
Extraordinary experience, interesting and beautiful. Vanessa was very nice and took very well care of all the group.
Rocio C,
Jul 26, 2025
- Review from Viator
We asked for tour in Spanish and were two people, so it was a private tour, so great! It is an entertaining and interesting experience, but Dora did it amazing!! He has great knowledge and tells everything in an exciting way, we had an amazing time, and he speaks super good Spanish! A charmer, he told us curiosities along the way about the island, customs, volcanoes... A total hit!!!

Rayna L,
Jul 20, 2025
- Review from Viator
Antonio was our guide through Pro Island Tours. Absolutely amazing afternoon. My cousin and I enjoyed a personalised tour, especially tailored to our needs and interests. We saw things off the beaten track, that not many tourists get to see. Not crowded, beautiful and amazingly interesting. Also taken to an amazing lava tube - could not upload photos, but an astonishing experience. Antonio was a nice, gracious, friendly and knowledgeable host. I would thoroughly recommend this tour.



Jennifer A,
Jun 8, 2025
- Review from Viator
This was a great experience. I learned a lot about the island and saw beautiful sites. It really added to my trip.
Clay B,
May 18, 2025
- Review from Viator
Dora, our guide, was very friendly, and took her time to guides us through an interesting trip. Thank you.
Operated by Pro Island Tour