Underground Volcanic Tour

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This full day expedition will guide you along the origin of the Azores islands; the middle earth of Terceira, through volcanos and caves.

Explore in your pace and enjoy the full attention of your guide because this activity is private tour for individuals or small groups.

Some caves are not open for the public and only accessible with your guide.

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  • Vacation Style Holiday Type
      Discovery, Guided Tours
    • Activity Level Moderate
    • Group Size Small Group
      1 - 6
    All about the Underground Volcanic Tour.

    Terceira Island, as volcanic origin presenting their morphological diversity, but maintaining some common geological traits. Its origin is associated with several volcanic eruptions, that occurred in the Alpine Orogeny; that remounts to the Tertiary Age to the present days, leaving an outstanding speleological heritage.

    So, we wish to share these beautiful caves, the fumaroles known as Furnas do Enxofre and Algar do Carvão, only volcano accessible to the public.


    Photo tour

    Do you want to increase your skills a nature photographer? Opt for our photo tour. We teach you the techniques to shoot great pictures in extreme light situations. We will spend extra time during the cave hike to use different techniques so you will create great memories.

    Capture at the moment!



    Full day private tour, € 90,- per person

    Full day tour, € 70,- per person for a small group



    The tour package inclusions and exclusions at a glance
    What is included in this tour?Items that are included in the cost of tour price.
    • Your private guide
    • Pick-up and drop-off
    • Transportation
    • Insurance
    What is not included in this tour?Items that are not included in the cost of tour price.
    • Food and drinks are not included
      You can choose to bring lunch or visit a restaurant
    • Admission fees for monuments, specials sights and museums
    1. Hiking Underground Hike

      We make a underground hike in caves that have not been opened to the public. Of cource we have the permission and the experience to walk you through it.

      The hike is a wonderful opportunity to increase your photography skills if your wish to learn new techniques and make creative shots in the dark.

    2. Smelling Furnas do Enxofre

      Witness the activity of planet Earth. You can see (and smell!) the warm sulphured steam leaving the thin crust of the planet. Because of this phenomena you will see unique vegetation and colour schemes in the landscape.

    3. Caving Algar do Carvão

      Explore the chimney of the island. Algar do Carvão is a cave unique in its sort because it’s the only formal volcano you can actually enter. Once the lava was pushed out and now you can see the natural art on the wall created by the richness of minerals.