Geography

Darke County, Ohio — history, communities, and regional profile Darke County, Ohio County in western Ohio centered on Greenville. Established 1809 and named for William Darke, it has agricultural roots, historic sites tied to the Treaty of Greenville, and small t…

Darling River — overview, course, history, uses and environmental issues Darling River The Darling River is a major Australian river within the Murray–Darling basin. This article explains its course, ecology, history, significance to communities, and contemporary env…

Darlington County, South Carolina: overview, history, economy and notable facts Darlington County, South Carolina Darlington County is a largely rural county in northeastern South Carolina known for Darlington Raceway, agriculture, manufacturing in Hartsville, and a mix of small towns and hist…

Darmstadt-Dieburg Darmstadt-Dieburg is a rural district in southern Hesse, Germany, known for its Odenwald landscape and the Messel Pit UNESCO fossil site. It combines small towns, agricultural land…

Dashkasan District (raion) of Azerbaijan Dashkasan District Dashkasan District is a mountainous administrative district in northwestern Azerbaijan, centered on Dashkasan city. The region is noted for mining, forests and proximity to Ganja.

Daugava (Western Dvina) — river of Russia, Belarus and Latvia Daugava The Daugava (Western Dvina) rises in the Valdai Hills and flows through Russia, Belarus and Latvia into the Gulf of Riga; an important artery for transport, power and culture.

Dauphin Quarter (Saint Lucia) Dauphin Quarter Dauphin is a quarter on the Caribbean island of Saint Lucia. This article explains its role, origins of the name, local characteristics, economy, administration and notable feature…

Davao Region (Region XI): overview, geography, economy and culture Davao Region Administrative region in southeastern Mindanao, Philippines (Region XI) centered on Davao City; notable for Mount Apo, agricultural exports, diverse peoples, and coastal ecosystems…

Daviess County, Missouri A rural county in northwestern Missouri centered on the city of Gallatin, known for agriculture, small towns and 19th-century settlement history; population 8,433 at the 2010 censu…

Davis Strait — Arctic sea passage between Greenland and Baffin Island Davis Strait Davis Strait is the broad channel between mid‑western Greenland and Baffin Island, connecting Baffin Bay and the Labrador Sea. It influences regional oceanography, ecosystems, navi…

Davos District (Graubünden, Switzerland) Davos (district) Administrative district in the canton of Graubünden, Switzerland; alpine territory around the town of Davos with seven sub-districts, a tourism economy and notable administrative r…

Day County, South Dakota: Overview, Geography, History and Economy Day County, South Dakota Day County in northeastern South Dakota, with county seat Webster, is a rural area known for prairie lakes, wildlife refuges and agriculture. The population was about 5,710 at the…

Daykundi Province Daykundi is a mountainous province in central Afghanistan (Hazarajat) with capital Nili. Created in 2004, it has a majority Hazara population and an economy based on highland agric…

Dead reckoning: estimating position by course, speed, and time Dead reckoning Dead reckoning is a navigation technique that estimates current position from a known point using speed, course and elapsed time; still used where fixes are unavailable and in mode…

Dead Sea Salt lake at the Earth's lowest land elevation, between Jordan and the West Bank; renowned for extreme salinity, buoyant waters, mineral resources, and environmental challenges.

Dean, Cumbria: village and civil parish in Allerdale Dean, Cumbria Dean is a small village and civil parish in the Allerdale district of Cumbria, northwest England. It is a rural community with historic roots, local amenities and links to nearby t…

Death Valley: overview, landscape, history and natural significance Death Valley Death Valley is a desert basin in eastern California famed as the hottest, driest and lowest area in North America; its unique geology, ecology and cultural history attract scienti…

Death zone (high-altitude mountaineering) Death zone The 'death zone' is the extreme-altitude region above about 8,000 m where reduced oxygen and pressure make sustained human life impossible without aid. Risks, physiology, and preve…

Decatur County, Kansas Rural county in northwest Kansas, with Oberlin as its county seat. Low population, agricultural economy, Great Plains landscape, and named for naval officer Stephen Decatur Jr.

Deccan Plateau — South-Central Indian Upland Deccan Plateau A broad, elevated triangular region covering much of peninsular India. Describes its geography, geology (Deccan Traps), ecosystems, human use, and boundaries formed by surrounding…

Deep River, Iowa Deep River is a small rural city in central Iowa, named for a nearby watercourse. It is a local center for agriculture, community life, and small‑town institutions within the Unite…

Deer Lodge County, Montana Deer Lodge County is a small Montana county centered on Anaconda. Created in 1865, it has a mining and ranching history, a consolidated city–county government, and notable historic…

Deggendorf District (Bavaria): geography, rivers and topography Deggendorf (district) Overview of Deggendorf District in Bavaria: where Bavarian Forest foothills meet Danube and Isar valleys, with farmland, woodlands and the Einödriegel upland peak at about 1,220 m.

Dehradun — Capital of Uttarakhand and Principal City of the Doon Valley Dehradun Dehradun, the administrative capital of Uttarakhand, lies in the Doon Valley between the Ganges and Yamuna. Known for schools, research institutions, scenic foothills and as a gate…

DeKalb County, Illinois County in northern Illinois anchored by the cities of DeKalb and Sycamore; agricultural base, home to Northern Illinois University, and part of the Chicago–Naperville–Elgin metropo…

Del Veladero — High Andes Peak in Argentina Del Veladero Del Veladero is a 6,471 m mountain in the Andes of Argentina, noted as one of the higher Andean summits and commonly listed among the range's top-ranked peaks.

Delaware (U.S. state) Delaware Delaware is a small Mid-Atlantic U.S. state known as the First State for early ratification of the Constitution. Capital: Dover; largest city: Wilmington. Noted for its coastal pla…

Delaware River: Geography, History, and Uses Delaware River Major river of the northeastern United States. Rises in the Catskills and flows about 280 miles to Delaware Bay, forming state borders and supporting cities, ecosystems, commerce a…

Delaware River (Kansas) The Delaware River in northeastern Kansas is a 94-mile tributary of the Kansas River. Its 1,117 sq mi basin includes Perry Lake and is a priority (Category 1) watershed for restora…

Delémont District (Canton of Jura, Switzerland) Delémont District Administrative district in the canton of Jura, Switzerland, centered on the city of Delémont. Predominantly French-speaking and made up of 28 municipalities; historical, cultural,…

Delitzsch (rural district) Delitzsch (district) Delitzsch was a rural district in the Free State of Saxony, Germany, named for its administrative seat Delitzsch; it was merged into the district of Nordsachsen during the 2008 reg…

Delmarva Peninsula: Geography, History and Coastal Life Delmarva Peninsula The Delmarva Peninsula is a large Mid-Atlantic coastal peninsula shared by Delaware, Maryland and Virginia. This article covers its geography, history, economy, recreation and dist…

Delta Air Lines Flight 191: 1985 Dallas/Fort Worth Microburst Accident Delta Air Lines Flight 191 A 1985 accident in which Delta Air Lines Flight 191 encountered a microburst on approach to Dallas/Fort Worth, causing a crash that led to major changes in wind-shear detection and…

Delta County, Colorado County in western Colorado centered on the city of Delta; noted for agriculture, Grand Mesa, rural towns and outdoor recreation. Population was 30,952 at the 2010 census.

Demmin, Germany: history, geography and notable features Demmin Demmin is a town in Mecklenburg-Western Pomerania, Germany, situated at the meeting of the Peene, Trebel and Tollense rivers. It has a medieval core, regional administrative histor…

Democratic Republic of the Congo Comprehensive overview of the Democratic Republic of the Congo: geography, history, people, resources, politics, and contemporary challenges.

Demographics of Azerbaijan An overview of Azerbaijan's population: size, distribution, ethnic and linguistic composition, religion, historical shifts, migration, and social indicators.

Demographics of Nova Scotia Overview of Nova Scotia's population, settlement patterns, languages, ethnic communities, age profile, migration and historical influences shaping its demographics.

Demographics of Pakistan: population, ethnic groups, and urban trends Demographics of Pakistan Overview of Pakistan’s population distribution, ethnic and linguistic makeup, urbanization, age structure, migration, and demographic challenges and opportunities.

Demography of Afghanistan Summary of Afghanistan's population: size, ethnic and linguistic composition, religion, displacement and historical trends shaping its demographic profile.

Denmark — the Kingdom in Northern Europe Denmark Denmark (Danmark) is a Nordic constitutional monarchy in Northern Europe, known for its welfare state, maritime history, renewable energy, and the autonomous territories of the Far…

Denmark Strait (Greenland Strait) Denmark Strait Oceanic strait between Greenland and Iceland linking the Greenland Sea and the Irminger Sea; important for ocean circulation, marine ecosystems, navigation history and climate rese…

Dennebrœucq — a small commune in Pas-de-Calais, northern France Dennebrœucq Dennebrœucq is a rural commune in the Pas-de-Calais department of northern France, historically part of Nord-Pas-de-Calais. It exemplifies small village life, local administration,…

Dennery Quarter (Saint Lucia) Dennery Quarter Dennery Quarter is an administrative district on the eastern coast of Saint Lucia centered on the town of Dennery. It features coastal fishing communities, lowland agriculture, and…

Deosai Mountains and Plains Deosai Mountains High-altitude plateau and mountain region between the Vale of Kashmir, Gilgit Agency and Baltistan, known for its expansive plain, alpine ecology and seasonal access routes.

Departments of Argentina Second-level territorial divisions used by most Argentine provinces: organization, functions, history, and distinctions from partidos and municipalities.

Departments of Chad An overview of Chad’s 61 departments: their role within the country’s administrative hierarchy, organization, historical development, and notable regional differences.

Departments of Paraguay Overview of Paraguay's 17 departments and the capital district, their organization into two regions separated by the Paraguay River, administrative role, and notable geographic and…