3,546 articles
Masuria
Masuria (Mazury, Masuren) is a postglacial lake district in northeastern Poland with over 2,700 lakes, the Great Masurian Lakes, a UNESCO biosphere reserve, and a history under East Prussia until 1945.
Mato Grosso Plateau
Mato Grosso Plateau (Planalto Mato-Grossense), elevated central-western Brazilian Highlands terrain in Mato Grosso state; mosaic of chapadas and plateaus, including Parecis and Guimarães, dividing Amazon, Paraguay and Tocantins-Araguaia drainages above the Pantanal.
Matsu Islands (马祖列岛)
Matsu Islands (马祖列岛), Lienchiang County, ROC (Taiwan): 36 granite islands near the Minjiang Estuary, Eastern Min culture, militarized 1949–1992, now battlefield-heritage tourism under PRC gray-zone pressure.
Matterhorn
The Matterhorn (Monte Cervino, Mont Cervin) is a 4,478 m pyramidal peak on the Swiss-Italian border above Zermatt, first climbed by Edward Whymper's team on 14 July 1865, when four climbers died on the descent.
Matty Island
Matty Island is an uninhabited island in the Kitikmeot Region, Nunavut, Canada, between King William Island and the Boothia Peninsula, known for the phantom Franklin wreck tradition and Amundsen's 1903 grounding on its shoals.
Matutum
Matutum (Matutan), a 2,262 m symmetrical stratovolcano in southern Mindanao, Philippines, near General Santos; last confirmed eruption 1290 CE, forested 320 m crater, and a 13,947 ha protected landscape.
Maui
Maui, the Valley Isle, is Hawaii's second largest island (728 sq mi), formed by Haleakala and the West Maui volcano, home to 143,574 people, historic Lahaina, and recovering from the August 2023 wildfires.
Mauna Kea
Mauna Kea (Maunakea, "White Mountain") is Hawaii's highest dormant shield volcano at 13,796 ft, a glaciated postshield volcano, a premier astronomy site with a dozen telescopes, and a sacred Native Hawaiian landscape now governed by the MKSOA.
Maungakiekie / One Tree Hill
Maungakiekie / One Tree Hill, also Te Tōtara i Āhua, is a 182-metre volcanic cone and former pā in Epsom, Auckland, crowned by the 1940 Campbell obelisk and co-governed by the Tūpuna Maunga Authority.
Mavericks Beach
Mavericks Beach, at Pillar Point near Half Moon Bay, California, fronts the famous Mavericks big-wave reef break half a mile offshore, named after a dog in 1963, pioneered by Jeff Clark in 1975, and home to a winter surf contest since 1998.
Mawson Coast
Mawson Coast, part of Mac.Robertson Land in East Antarctica between 60°E and Murray Monolith (66°53'E), discovered on the 1929-30 BANZARE voyage and named for Sir Douglas Mawson; home to Mawson station since 1954.
Mawson Peninsula
Mawson Peninsula, George V Land, East Antarctica: a narrow peninsula over 57 km long rising to about 457 m, named after Sir Douglas Mawson, approved 1959; distinct from Mawson research station.
Maya Mountains
The Maya Mountains are a mountain range in west-central Belize extending into Guatemala, rising to 1,124 meters at Doyle's Delight, Belize's highest peak, and covering about 4,000 square kilometers.
Mazong Mountain
Mazong Mountain (马鬃山, Horse Mane Mountain) is a 2,584 m peak and range in Subei County, Jiuquan, Gansu, in the Beishan highlands of the western Gobi on the China-Mongolia border, home to Mazongshan town, Gansu's only border port, opened 1992 and closed since 1993.
Mbang Mountains
Mbang Mountains (Mbang Hills), a highland range in Cameroon near the Central African Republic border, anchoring the country's northeast-to-southwest highland chain; reported summits of 1,641 m, 1,923 m, or 1,627 m depending on source.
Mbusihite Island
Mbusihite Island is a small islet in Western Province, Solomon Islands, near Roviana Lagoon off New Georgia, at 8°16′57″S 157°33′14″E, elevation 2 m, near Hapai and Mbusinomana Island; GeoNames ID 2105710, Wikidata Q49657877.
McDonald Peak
McDonald Peak, Montana's Mission Range high point (9,794-9,820 ft, 5,614 ft prominence), an ultra-prominent summit on the Flathead Indian Reservation closed July 15-October 1 for grizzly bears feeding on army cutworm moths.
McMurdo Dry Valleys
McMurdo Dry Valleys, southern Victoria Land, Antarctica: the continent's largest ice-free polar desert, with glacier-melt streams, ice-covered lakes, Don Juan Pond, Blood Falls, and long use as a Mars analog.
McNeil Island
McNeil Island, in Pierce County, Washington, housed a unique prison from 1875 to 2011 that evolved into the Special Commitment Center and a wildlife preserve.
Mecklenburg
Mecklenburg is a historic region on the Baltic coast of northern Germany, named after the Obotrite fortress Michilenburg near Wismar and now forming the western part of Mecklenburg-Vorpommern.
Medetsiz Tepe
Medetsiz Tepe (Medetsiz Dağı, Mount Medetsiz) is a 3,524 m limestone peak in the Bolkar Mountains of the Central Taurus, Turkey; the range's highest summit, an ultra-prominent peak with 2,058 m prominence and a small glacier.
Meighen Island
Meighen Island: uninhabited Nunavut island in the Queen Elizabeth Islands, Canadian Arctic, named for Prime Minister Arthur Meighen (named 1921). Home to the stagnant, shrinking Meighen Ice Cap, a reference glacier monitored since 1960.
Mekong Delta
Mekong Delta (Cửu Long, Nine Dragons): Vietnam's southern river delta, third largest in the world, home to 18 million people, producing half the nation's rice; now sinking from subsidence, sand mining, and upstream dams.
Melbourne Island
Melbourne Island, Nunavut: uninhabited island in western Queen Maud Gulf, Canada, at 68.5 N, 104.7 W; largest island in the gulf's west end, hills to 60 m, brant and eider nesting coasts; distinct from islands in British Columbia and French Polynesia.
Melchior Islands
Melchior Islands: low, ice-covered islands in Dallmann Bay, Palmer Archipelago, Antarctic Peninsula, named by Charcot 1903-05 after Admiral Melchior; site of Argentina's 1947 Base Melchior and the 1942 Primero de Mayo lighthouse.
Melimoyu
Melimoyu: ice-capped Chilean stratovolcano (2,400 m, 44.08°S 72.88°W) in the southern Andean Southern Volcanic Zone near Puyuhuapi, with an 8-km buried caldera, no historic eruptions, two VEI 5 Holocene eruptions, and 2010 seismic unrest.
Melville Island (island, Australia)
Melville Island, Tiwi Islands, is Australia's second largest island (5,786 km2) after Tasmania, lying 80 km north of Darwin in the Arafura Sea, separated from Bathurst Island by Apsley Strait, Tiwi-owned Aboriginal freehold with Milikapiti and Pirlangimpi communities.
Melville Island (island, Canada)
Melville Island is a large uninhabited island in the Canadian Arctic Archipelago, split between the Northwest Territories and Nunavut. Known for deep permafrost, Parry's 1819 wintering, and the Cape Bounty Arctic Watershed Observatory; distinct from Halifax's Melville Island and Melville Peninsula.
Melville Peninsula
Melville Peninsula, Nunavut, Canada: Arctic mainland peninsula, about 400 km long and 100 km wide, west of Foxe Basin, joined to the mainland by Rae Isthmus, separated from Baffin Island by Fury and Hecla Strait; highest point 521 m.
Menengai
Menengai is a trachytic shield volcano with an 8 x 12 km caldera near Nakuru, Kenya, last erupting around 6050 BCE, now a major geothermal field developed by GDC with 1,600 MW estimated potential.