Mohnblüten an einem Steinbruch in der Laacher See region (Photo: Tobias Schorr) Mehr auf VolcanoDiscovery:Introduction to Plate Tectonics: The Earth's upper, rigid layer is broken into several plates which are in constant motion to one another. Most earthquakes and volcanoes occur as result of these plate boundaries. Fotos von Vulkanen aus der ganzen Welt - die meisten entstanden während unseren Expeditionen. Volcano Special Tours: We organize tours to particularly active volcanoes and during ongoing eruptions for extended observation time from various viewpoints. These trips, exclusively for very small groups, are often announced only at short notice and require fast travel and flexibility. Each trip is accompanied by a volcanologist from our team. Examples include: Kilauea (Hawai'i), Colima (Mexico), Krakatau and many others. Nyiragongo volcano photos: Nyiragongo (DR Congo) has the world's largest and most active lava lake. Enjoy our pictures taken during several expeditions over the past years.