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Divergent plate boundaries in oceans Two ocean plates move apart from each other. Hot upwelling mantle material forms magmas that continuously produce new oceanic crust. An ocean widens.
Volcanoes & Spices This 17-days adventurous expedition is one of our most exciting volcano tours! Visit Halmahera, North Sulawesi and the Sangihe Islands with some of Indonesia's most active volcanoes, including Dukono, Ibu, Lokon, Soputan and Karangetang.
Tours to active volcanoes Watching a volcanic eruption is one of the most impressive natural displays. We have a wide selection of tours to active volcanoes worldwide at different activity and difficulty levels.
Volcano Calendar 2020 We're proud to present our 2020 volcano calendar: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past two years.