
UNDERGROUNDTOUR (Full Day Private Tour)
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September 2026
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Who is going?
Adults
Age 13 and over
Children
Age 12 and under
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Free cancellation up to 24 hours before. Same price on Viator, Outty earns a commission.
Traveler rating
5.0/5
Based on 55 traveler reviews. Ratings and reviews provided by Viator and Tripadvisor.
Quick answer
Is UNDERGROUNDTOUR (Full Day Private Tour) worth booking?
UNDERGROUNDTOUR (Full Day Private Tour) is a 6-hour experience in Terceira, Portugal, from $180 per person. It scores 81 out of 100 on the Outty Ranking, which we label “Exceptional”, based on a 5/5 rating across 55 reviews. Cancellation is free up to 24 hours before the start time. Same-day spots are currently showing.
- Outty Ranking
- 81 / 100
- Rating
- 5/5 (55)
- Duration
- 6 hours
- From
- $180 per person
Unique Tour, for people for you that love to be in the nature, adventurers and explorers. Terceira Island, as volcanic origin presenting their morphological diversity, maintaining some common geological traits. We wish
What you get
- Hotel pickup and drop-off
- Local Professional guide
- Private tour
- Professional photographer guide
- Use of helmet
- Transport by air-conditioned minivan
About this experience
Unique Tour, for people for you that love to be in the nature, adventurers and explorers. Terceira Island, as volcanic origin presenting their morphological diversity, maintaining some common geological traits. We wish to share these several beautiful caves (100%natural - difficult level) not open to the public. Because the caves it`s in the nature and some with small areas, and we need to cross some farm fields, we recommend: Hiking boots * Pants and Rain jacket God balance and flexibility Algar do Carvão Will be closed from 20th of October 2024 till 2026, for renovation. The only 2 places that are open to public is Volcano Algar do Carvão and Gruta do Natal. This places are only open Fall/winter on Tuesday, Wednesday, Friday and Saturday. In summer every day is open, also closed on expecial occasions as Christmas days or special date. For children after 12 years old.
What's included
Included
- Hotel pickup and drop-off
- Local Professional guide
- Private tour
- Professional photographer guide
- Use of helmet
- Transport by air-conditioned minivan
Not included
- Food and drinks
- All Fees and Taxes
- Tickets to Algar do Carvão (Close for renovation till 2026)and Gruta do Natal
What you'll see and do
Azores Expeditions
If you like to connect more with nature, this is the right activity for you. You can do one or more trails at your own pace, without pressure and have fun at the same time with us. The traces of vulcanice activity disclaim in Terceira Island spectacular shapes and easily visitable with achievement of trails. And this network of trails is on the disposition of all for enjoyment of the beauty unique exceptionally landscape.
Pass by without stopping
Where it starts and ends
Hotel pickup
Pickup is included for all travelers. Pickup begins about 5 minutes before departure.
Before you book
- Cancellation
- For a full refund, cancel at least 24 hours before the scheduled departure time.
- Languages
- pt, en, es
- Ticket
- Mobile Only
- Runs on
- Every day
- Group size
- Up to 4 travelers per booking
- Operated by
- Azores Expeditions
Know before you go
- Specialized infant seats are available
- Not recommended for travelers with spinal injuries
- Not recommended for pregnant travelers
- Not recommended for travelers with poor cardiovascular health
- Travelers should have a high level of physical fitness
- Children must be accompanied by an adult
- Only for children after 12 years old
- Possible only to do this tour with 4 people only.
- Not recommended for travelers with bad knees/back problems
- Recomend hiking boots
- Travelers should have a strong physical fitness level
Photos






Good to know
- Duration
- 6 hours
- Free cancellation
- Up to 24h before
- Minimum age to book
- 12+
- Availability
- Bookable today
- Runs on
- Every day
- Price range
- $180 to $250
- Hotel pickup
- Included for all travelers
- Booked in 30 days
- 19
- Verdict
- Exceptional
Why this scores 81
The Outty Ranking is a weighted composite. Here is how this experience performed on each component.
UNDERGROUNDTOUR (Full Day Private Tour): questions travelers ask
Practical detail on this experience, plus the wider planning questions for Terceira.
How much does UNDERGROUNDTOUR (Full Day Private Tour) cost?
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Prices start at $180 per person. The final price depends on the date, the time slot and the number of travelers, and peak weekends in Terceira usually price higher than midweek mornings. Live pricing and remaining availability are confirmed on the booking screen before you pay.
How long does UNDERGROUNDTOUR (Full Day Private Tour) take?
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Plan for about 6 hours from start to finish, not counting travel to the meeting point. Most travelers leave another 30 minutes on either side so the rest of the day in Terceira is not rushed.
Is UNDERGROUNDTOUR (Full Day Private Tour) worth it?
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It holds an Outty Ranking of 81 out of 100, which we label "Exceptional". That score blends traveler sentiment (5/5 across 55 reviews), the depth of that review evidence, recent booking momentum, value for money against comparable last minute in Terceira, and how flexible the cancellation terms are.
Can I cancel or reschedule UNDERGROUNDTOUR (Full Day Private Tour)?
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Yes. Cancel free up to 24 hours before the start time for a full refund. Inside that window the booking is non-refundable, and no-shows are not refunded.
Is UNDERGROUNDTOUR (Full Day Private Tour) suitable for kids and families?
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The operator sets a minimum age of 12. Older children generally do well here, and families should factor in the 6-hour running time when deciding.
How far in advance should I book UNDERGROUNDTOUR (Full Day Private Tour)?
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Around 19 people booked this in the last 30 days, so popular slots go early. Two to three weeks ahead is comfortable in shoulder season, while summer weekends and holidays in Terceira can sell out a month out. Same-day spots do open up when other travelers cancel, so it is worth checking if you are already in town.
What should I bring or wear?
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Bring photo ID, your booking confirmation on your phone, a refillable water bottle and comfortable shoes. Dress for the weather in Terceira and add a light layer if any part of the 6-hour experience runs outdoors or after sunset.
Where does UNDERGROUNDTOUR (Full Day Private Tour) start and how do I get there?
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The exact meeting point and directions are on your voucher once you book, and they sit in central Terceira within reach of public transport. Arrive 15 minutes early: late arrivals are treated as no-shows by most operators.
What are the best things to do in Terceira?
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On Outty we rank every Terceira experience on the same 0 to 100 scale, and alongside this one the highest scorers right now include Terceira Island: Full Day Tour, Underground Van Tour (Half Day) | Terceira Island, Watching whales and dolphins on Terceira Island. The city page groups everything into most popular, highest reviewed, last minute and family-friendly so you can build a day around what actually delivers.
When is the best time to visit Terceira?
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Booking patterns follow the same curve: prices and queues climb in peak weeks, while shoulder season gives you better availability on the top-ranked experiences and more room to change plans.
How many days do you need in Terceira?
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Three full days covers the headline sights without sprinting. A workable rhythm is one anchor experience each morning, such as this one, an unhurried afternoon in a single neighborhood, then a food or nightlife booking in the evening. Five days lets you add a day trip outside the city.
Do I book through Outty or through the operator?
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Outty ranks and explains the experiences, then hands you to Viator to complete the booking with the operator directly. The price is the same as booking on Viator yourself, and Outty earns an affiliate commission on the referral, which is how the rankings stay free to read.
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