Germany, Baden-Württemberg, Breisgau-Hochschwarzwald, Black Forest (Schwarzwald), Kaiserstuhl region, Vogtsburg (aerial view)

France, Auvergne-Rhone-Alpes, Puy de Dome, Orcines, Regional Natural Park of the Auvergne Volcanoes,, UNESCO World Heritage Site, the Chaine des Puys, Puy Pariou in the foreground (aerial view)

Mauritius, Black River disctrict, Le Morne Brabant, listed as World Heritage by UNESCO (aerial view)

Mauritius, Black River disctrict, Le Morne Brabant, listed as World Heritage by UNESCO (aerial view)

Guatemala, Solola department, Panajachel on the Northeast shore of Lake Atitlan, Toliman and Atitlan volcanoes in the background

Spain, Canary Islands, Tenerife, the beach and cliffs of Los Gigantes

Spain, Canary Islands, Gran Canaria Island, Agaete

Costa Rica, Alajuela Province, Arenal. Arenal Volcano with steam rising from its peak. This active stratovolcano erupted last in 2010.

Ecuador, Tungurahua Province, Andes, Tungurahua volcano, locally known as gorge on fire in quechua and nicknamed the black giant, the volcano is almost constantly in eruption

Romania, Buzau, mud volcano linked to gas lifts on the surface

Germany, Baden-Württemberg, Breisgau-Hochschwarzwald, Black Forest (Schwarzwald), Kaiserstuhl region, Bickensohl (aerial view)

France, Puy de Dome, Orcival, Regional Natural Park of the Auvergne Volcanoes, Monts Dore, Serviere lake, volcanic maar lake (aerial view)

France, Puy de Dome, Orcines, Regional Natural Park of the Auvergne Volcanoes, the Chaîne des Puys, listed as World Heritage by UNESCO, the Puy de Dome volcano (aerial view)

France, Reunion island, Reunion National Park listed as World Heritage by UNESCO, Piton de la Fournaise volcano, 2007 lava flow (aerial view)

Mauritius, Black River disctrict, Le Morne Brabant, listed as World Heritage by UNESCO (aerial view)

Mauritius, Black River disctrict, Le Morne Brabant, listed as World Heritage by UNESCO (aerial view)

Arenal volcano, La Fortuna, Alajuela Province, Costa Rica

Arenal volcano at sunset, La Fortuna, Alajuela Province, Costa Rica

Peru, Arequipa Province, surroundings of Arequipa, around Sabandia village and Chachani volcano

Guatemala, Solola department, San Juan la Laguna on the southern shore of Lake Atitlan, sunrise from Cerro Rupalaj Kistalin or Rostro Maya, the highest point of view of Lake Atitlan

Guatemala, Solola department, San Juan la Laguna on the southern shore of Lake Atitlan, sunrise from Cerro Rupalaj Kistalin or Rostro Maya, the highest point of view of Lake Atitlan, Pacaya active vol...

Guatemala, Solola department, Panajachel on the Northeast shore of Lake Atitlan, Toliman, Atitlan and San Pedro volcanoes in the background

Guatemala, Solola department, Panajachel on the Northeast shore of Lake Atitlan, Toliman and Atitlan volcanoes in the background

Guatemala, Solola department, Santa Cruz la Laguna on the shore of Lake Atitlan populated by a maya Kaqchikel community, accessible only by foot or boat, San Pedro volcano

Guatemala, Sacatepequez department, Antigua Guatemala, listed as World Heritage by UNESCO, Agua volcano (alt : 3760m)

Chile, Antofagasta Region, San Pedro de Atacama, tthe volcano Lican cabur in the Atacama Desert

Argentina, Salta province, Puna desert, Tolar Grande, Salar de Arizaro and volcan Aracar

Spain, Canary islands, Lanzarote island, the golf

Spain, Canaries Islands, Lanzarote island, beach of Famara

Spain, Canaries Islands, Lanzarote island, the Caldera Blanca seen on Montana Calderata and Mancha Blanca

Spain, Canaries Islands, Lanzarote island, Punta del Papagayo and the mount Ajache

Spain, Canaries Islands, Lanzarote island, the Caldera Blanca seen on Montana Calderata

Portugal, Azores archipelago, Sao Miguel island, Ponta da Ferraria, volcanic rock

Portugal, Azores archipelago, Sao Miguel island, Furnas, active volcanic complex with 22 thermal springs and many fumaroles sites

Portugal, Azores archipelago, Sao Miguel island, Sete Cidades, Boca do Inferno viewpoint, view over Lagoa Santiago and Lagoa Azul crater lakes

Portugal, Azores archipelago, Sao Jorge island, UNESCO Biosphere Reserve, the central volcanic ridge is a succession of old cones and craters occupied by small lakes

Portugal, Azores archipelago, Sao Jorge island, UNESCO Biosphere Reserve, Rosais, countryside and Pico volcano in the background

Portugal, Azores archipelago, Sao Jorge island, UNESCO Biosphere Reserve, Calheta, natural pools, Pico volcano in the background

Portugal, Azores archipelago, Pico island, Pico volcano (alt : 2351m) from Lajes do Pico

Portugal, Azores archipelago, Pico island, Pico volcano (alt : 2351m) from Lajes do Pico

Italy, Campania region, archeological site of Pompeii listed by UNESCO as a World Heritage Site, ancient city of the Roman Empire destroyed by the eruption of Mount Vesuvius in AD 79, Villa of the Mys...

Italy, Campania region, archeological site of Pompeii listed by UNESCO as a World Heritage Site, ancient city of the Roman Empire destroyed by the eruption of Mount Vesuvius in AD 79, the Forum

Italy, Campania region, archeological site of Pompeii listed by UNESCO as a World Heritage Site, ancient city of the Roman Empire destroyed by the eruption of Mount Vesuvius in AD 79, Mount Vesuvius i...

Italy, Sicily, Aeolian Islands, Lipari island, view of the volcano Vulcano

Italy, Sicily, Aeolian Islands, Stromboli, Erupting volcano

Iceland, Vesturland, Snaefellsnes Peninsula, Moss covered lava field at Berserkjahraun

The river Oexara in in the Thingvellir National Park in Iceland during winter. Thingvellir is listed as UNESCO World Heritage Site. Scandinavia, Iceland

Tanzania, Arusha Region, Rift Valley, surroundings of lake Natron, the Oldoinyo Lengai, holy Maasai mountain

Basalt rock formations on the coast near Hofsos, Skagafjoerdur bay, northern Iceland, Iceland

Puu Oo volcano, volcanic eruption, lava flow, red hot lava flowing into the Pacific Ocean, Hawaii-Volcanoes-National Park, USA, Hawaii, United States

Puu Oo volcano, volcanic eruption, lava, red hot lava flow, Hawaii-Volcanoes-National Park, USA, Hawaii, United States

Parinacota volcano reflecting in the Chungara lake, Lauca national park, UNESCO Biosphere Reserve, Arica and Parinacota Region, Chile

Parinacota volcano reflecting in the Chungara lake, Lauca National Park, UNESCO Biosphere Reserve, Arica and Parinacota Region, Chile

Costa Rica, Alajuela Province, Arenal. Arenal Volcano with steam rising from its peak. This active stratovolcano erupted last in 2010. A Turkey Vulture flies overhead.

Costa Rica, Alajuela Province, Arenal. Arenal Volcano with steam rising from its peak. This active stratovolcano erupted last in 2010.

Costa Rica, Alajuela Province, Arenal. Arenal Volcano with steam rising from its peak. This active stratovolcano erupted last in 2010.

Ethiopia, Dallol, Afar Region. A mineral encrustation at Dallol resembling an upturned mushroom. Gas vents, geysers, salt and sulphur at the hot springs produce spectacular colours and strange natural...

Ethiopia, Dallol, Afar Region. Gas vents, geysers, salt, iron stains, sulphur and halophile algae turn the hot springs at Dallol into a kaleidoscope of spectacular colours and strange natural formatio...

Ethiopia, Amhara Region, Simien Mountains. Rugged peaks of the Simien Mountains which rise to 4550m above sea level.

Ethiopia, Amhara Region, Simien Mountains, Simien Mountain National Park, Debark. Two waterfalls tumble down an escarpment in this spectacular view of the Simien Mountains which rise to 4550m above se...

Ethiopia, Amhara Region, Simien Mountains. Despite the rugged terrain in the Simien Mountains, a large population lives there, cultivating every available space of flat land. Distant Mount Ras Dashan...

Ethiopia, Amhara Region, Simien Mountains. Rugged peaks of the Simien Mountains which rise to 4550m above sea level.

Ethiopia, Amhara Region, Simien Mountains. The rugged foothills of the distant Simien Mountains.

Ethiopia, Amhara Region, Welo. An early morning view of the rugged landscape at the lake formed by a hydro-electric dam on the Tekeze River towards the distant Simien Mountains.

Ethiopia, Amhara Region, Welo. The 608km-long Tekeze River rises in the central Ethiopian Highlands and flows west, north and then west again until it joins a tributary of the Nile in Sudan.

Ethiopia, Amhara Region, Welo. The 608km-long Tekeze River rises in the central Ethiopian Highlands and flows west, north and then west again until it joins a tributary of the Nile in Sudan.