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Neyrac-les-Bains
Neyrac-les-Bains, a thermal spa in Meyras, Ardèche, France, on the maar Doris volcano; 37°C carbogazeous bicarbonated water, a rare CO2 mofette, Roman origins, and cures for skin and rheumatic conditions.
Ngoring
Ngoring Lake (鄂陵湖, Tibetan Cuoelang, cyan lake) is the largest freshwater lake on the Qinghai-Tibet Plateau, in Madoi County, Qinghai, at the Yellow River source; sister lake of Gyaring, area about 610-651 km2, elevation about 4,269 m.
Niagara Falls
Niagara Falls: three waterfalls (Horseshoe, American, Bridal Veil) on the Canada-US Niagara River between Lake Erie and Lake Ontario; 57 m Horseshoe drop, 168,000 m3/min peak flow, 1950 Treaty flow limits, hydropower, and 12,500-year erosion history.
Niagara River
The Niagara River connects Lake Erie to Lake Ontario along the New York–Ontario border, drops 160 feet at Niagara Falls, and is governed by the 1909 Boundary Waters Treaty and 1950 Niagara Diversion Treaty, which split power diversions equally while preserving scenic flow.
Niagara Scow
Niagara Scow, also called the Iron Scow or Old Scow: a steel dumping barge stranded in the upper Niagara River rapids since August 6, 1918, about 600 meters above Horseshoe Falls, site of a famous breeches-buoy rescue.
Nicobar Islands
The Nicobar Islands are the southern island group of India's Andaman and Nicobar Union Territory: 22 islands, 1,841 km², home to the Shompen and Nicobarese tribes, the Great Nicobar Biosphere Reserve, and the contested Great Nicobar Project.
Niger Delta
The Niger Delta is the large, mangrove-fringed delta where the Niger River meets the Atlantic Ocean in southern Nigeria, home to over 30 million people and the hub of Nigeria's oil industry.
Niger River
The Niger River is a major West African river, about 4,180 km long, rising in Guinea and flowing through Mali, Niger, and Nigeria into the Gulf of Guinea.
Niger Source
Niger Source is a 180,400-hectare Ramsar wetland in Faranah prefecture, Guinea, designated 17 January 2002, protecting the headwaters of the Niger River; also a Classified Forest since 1945.
Nigula Nature Reserve
Nigula Nature Reserve (Nigula looduskaitseala), established 11 July 1957 in Pärnu County, Estonia, protects a 6,430.9 ha West Estonian raised bog, old forests, and bog islands; Ramsar site since 1997, Natura 2000 since 2004, with bird monitoring since 1968.
Nile Delta
Nile Delta (Lower Egypt, Miṣr Baḥr): triangular Mediterranean lowland of northern Egypt, ~1 m above sea level at the coast, home to half of Egypt's population; sediment trapped behind the Aswan High Dam plus subsidence drive coastal erosion and flooding risk.
Nine-dash line (九段线)
The nine-dash line (九段线) is the U-shaped demarcation on Chinese maps claiming most of the South China Sea. Drawn as an eleven-dash line in 1947, it was ruled to have no legal basis for historic rights by the 2016 UNCLOS arbitration tribunal.
Ninety East Ridge
The Ninety East Ridge is a volcanic ridge in the eastern Indian Ocean running about 5,600 km along the 90°E meridian, formed by the Kerguelen hotspot.
Niobrara
The Niobrara is a river in northern Nebraska flowing east to the Missouri River, with 76 miles designated as a national scenic river in 1991.
Nipigon
Lake Nipigon, northwestern Ontario's largest lake entirely within the province, drains via the Nipigon River into Lake Superior as its largest tributary; area 4,848 km2, record 1915 brook trout, Nipigon Bay AOC delisted 2026.
Nipissing
Nipissing (Lake Nipissing) is a large shallow lake in north-central Ontario draining via the dammed French River to Georgian Bay, home of Nipissing First Nation and a heavily managed walleye fishery.
Nishiyama Onsen Keiunkan (西山温泉慶雲館)
Nishiyama Onsen Keiunkan (西山温泉慶雲館), also called Koshu Nishiyama Hot Spring Keiunkan, is a hot-spring ryokan in Hayakawa, Yamanashi, Japan, founded in 705 by Fujiwara Mahito and Guinness-certified since 2011 as the world's oldest hotel.
No net loss wetlands policy
No net loss of wetlands is a US policy goal requiring permitted wetland losses to be offset by restoration or creation, adopted by President George H. W. Bush in 1988.
Noatak
Noatak: a large clearwater river in northwestern Alaska flowing from the Schwatka Mountains to Kotzebue Sound, and the 6.6-million-acre Noatak National Preserve (ANILCA, 1980) protecting its watershed, home to Iñupiat subsistence for over 11,000 years.
Nonacho
Nonacho Lake, Northwest Territories, Canada: 784 km2 glacial scour lake, 8th largest in NWT, largest lake in the Taltson River basin, dam-regulated for Taltson hydroelectricity, with fly-in fishing from Yellowknife.
Nootka Sound
Nootka Sound, a sound on the west coast of Vancouver Island, British Columbia, between Clayoquot and Kyuquot Sounds. Site of Cook's 1778 visit, the sea-otter fur trade, and the 1790 Nootka Convention between Spain and Britain.
Nord Stream 2 (Северный поток — 2)
Nord Stream 2 (Северный поток — 2) is a Gazprom-owned twin Baltic Sea gas pipeline from Russia to Germany, completed in 2021 at a cost of about $11 billion but never commissioned after Germany froze certification in 2022 and sabotage destroyed one string.
Norfolk Ridge
Norfolk Ridge, a submerged continental ridge of Zealandia linking New Caledonia to northern New Zealand, about 1,500 km long with 20–25 km thick continental crust, formed by Eocene–Oligocene uplift during Tonga-Kermadec subduction initiation.
North American Basin
North American Basin (US BGN ACUF: North America Basin), a large deep-sea basin in the western North Atlantic between Newfoundland Ridge and the Puerto Rico Trench, containing the Sohm and Hatteras abyssal plains and Blake Ridge.
North American beaver
The North American beaver (Castor canadensis) is the continent's largest rodent, a keystone ecosystem engineer that builds dams and lodges, was nearly exterminated by the fur trade, and is invasive in parts of Eurasia.
North American Waterfowl Management Plan
The North American Waterfowl Management Plan (NAWMP) is a 1986 Canada–U.S. treaty-style agreement, joined by Mexico in 1994, restoring waterfowl to 1970s levels via wetland habitat conservation delivered through 22 habitat and 3 species joint ventures.
North Aral Sea
North Aral Sea (Lesser Aral), the Kazakhstan portion of the former Aral Sea fed by the Syr Darya. Split from the South Aral by 1987; the 2005 Kokaral dam restored its level, area, salinity, and fisheries.
North Caribou
North Caribou (North Caribou Lake, Weagamow/Round Lake) is a large lake in Kenora District, northwestern Ontario, home to North Caribou Lake First Nation, an Oji-Cree community, and a remote fly-in fishing destination.
North Caspian swamp
North Caspian swamp: shallow-water wetlands, reed beds and deltas of the Caspian Sea's northern basin in Kazakhstan and Russia; under 5 m deep over two-thirds of its area, Volga-fed, Ramsar-protected, and retreating as sea level falls.
North Channel
The North Channel is a sheltered stretch of water along the north shore of Lake Huron in Ontario, Canada, cut off from the main lake by Manitoulin Island.