#volcano
- Agri Dagi — The official Turkish name (Ağrı Dağı) for Mount Ararat, a dormant compound volcano located in the extreme east of Turkey, near the Armenian and Iranian borders. It is the highest peak in Turkey and the Armenian Highlands, carrying immense cultural, historical, and religious significance, traditionally identified as the resting place of Noah's Ark.
- Agung — An active stratovolcano located on the island of Bali, Indonesia, representing the highest geographical point of the island, with an elevation exceeding three thousand meters. In local Indonesian culture and Balinese Hinduism, this mountain is considered deeply sacred, viewed as the central axis of the universe and the dwelling place of the gods, hosting the famous Pura Besakih temple complex on its slopes.
- Aleutians — An archipelago of over 300 small volcanic islands, arranged in a long arc separating the Bering Sea from the North Pacific Ocean. Most of these islands belong to the US state of Alaska, while their western extremity belongs to Russia, the region being structurally renowned for intense seismic activity along the Pacific Ring of Fire.
- Ampato — An active, snow-capped stratovolcano located in the Andes mountain range of southern Peru, reaching an elevation of approximately 6,288 meters above sea level. It achieved global renown in 1995 when archaeologists discovered on its frozen ridges the perfectly preserved body of an Inca girl sacrificed in a religious ritual, known as 'Momia Juanita' or the 'Ice Maiden'.
- Antisana — A massive active stratovolcano located in the Andes of Ecuador, standing at an elevation of 5,758 meters above sea level. Situated approximately 50 kilometers southeast of the capital city Quito, the mountain is covered by an imposing glacier and belongs to a protected ecological reserve renowned for its montane biodiversity, thermal springs, and alpine lakes, serving as a prominent target for mountaineering expeditions and volcanological studies.
- Antofalla — A massive stratovolcano, active in a geological sense, located in northwestern Argentina (Catamarca region), at the edge of the arid Atacama Desert. This volcanic complex, whose peaks exceed six thousand meters in altitude, is flanked by a large homonymous salt flat (Salar de Antofalla) and represents one of the most isolated and spectacular geomorphological landmarks in the Andes mountain range.
- Ararat — A dormant volcanic mountain massif located in eastern Turkey, near the border with Armenia and Iran, composed of two major peaks: Greater Ararat (the highest peak in Turkey) and Lesser Ararat. In Judeo-Christian tradition and the biblical text of Genesis, the mountain is famous as the resting place of Noah's Ark after the global Deluge, serving as a core spiritual symbol for the Armenian people.
- Asama Yama — An active complex stratovolcano located in the center of Honshu Island, Japan, on the border between Gunma and Nagano prefectures. This mountain, rising above 2500 meters, is considered one of the most active and dangerous volcanoes in the Japanese archipelago, historically renowned for its catastrophic 1783 eruption, which caused massive destruction, loss of life, and regional climate effects.
- Askja — An active volcanic complex situated in the central highland region of Iceland (Dyngjufjöll Mountains), famous for its gigantic caldera partially filled by Lake Öskjuvatn and the secondary Víti crater; it represents a world-reference geological site formed by massive tectonic collapses and extremely violent Plinian eruptions.
- Mount Aso — Mount Aso (Aso-san); the largest active volcano in Japan and one of the largest in the world, located in Kumamoto Prefecture on Kyushu Island. It represents a remarkable volcanic complex, famous for its massive caldera with a circumference of approximately 120 kilometers, which houses several settlements and an active central crater (Nakadake) constantly emitting sulfurous gases.
- Auckland — The largest city and principal urban area of New Zealand, located in the North Island, built on a narrow isthmus between two natural harbors and surrounded by an active volcanic field; named Tāmaki Makaurau in Māori. Known globally as the 'City of Sails' due to its high concentration of yachts.
- Babuyan — An archipelago consisting of a group of volcanic islands located in the Luzon Strait, north of the main island of Luzon in the Philippines. This island group separates the South China Sea from the Philippine Sea and is characterized by mountainous terrain, a tropical climate prone to typhoons, remarkable marine biodiversity, and the presence of several active or dormant volcanoes, the most famous being the Camiguin de Babuyan volcano.