Continents, countries, people

Largest continent by area: Asia (~30% of land).
Smallest continent: Australia.
Highest continent by average elevation: Antarctica.
Largest country by area: Russia.
Smallest country by area: Vatican City (~0.44 km²).
Second-smallest country: Monaco.
Largest country by population: India.
Smallest country by population: Vatican City.
Most land neighbours: China and Russia (14 each; count depends on recognition).
Longest land border between two countries: USA–Canada.
Longest coastline: Canada (~202,080 km).
Lowest-lying country: Maldives (avg. ~1.5 m above sea level).
Most populous city (urban agglomeration): Tokyo in many keys; some keys say Delhi or Shanghai.
Highest permanent settlement: La Rinconada, Peru (~5,100 m).
Southernmost city: Ushuaia, Argentina.
Northernmost large city: Norilsk, Russia.

Oceans, seas, coasts, islands

Largest and deepest ocean: Pacific.
Smallest and shallowest ocean: Arctic.
Deepest point on Earth: Challenger Deep, Mariana Trench (~10,920–10,935 m).
Largest sea: Philippine Sea or South China Sea (keys vary); Mediterranean in older inland-sea lists.
Largest gulf: Gulf of Mexico.
Largest bay: Hudson Bay or Bay of Bengal (papers use both).
Longest strait: Strait of Malacca.
Narrowest strait often asked: Bosphorus, Istanbul.
Largest island: Greenland (Australia is a continent).
Largest archipelago: Indonesia.
Largest coral formation: Great Barrier Reef, Australia.
Largest atoll country / lowest nation: Maldives.
Largest river island: Majuli, Assam, India.
Largest lake island: Manitoulin Island, Canada.

Mountains, plateaus, volcanoes

Highest peak above sea level: Mt Everest, Nepal–China — 8,848.86 m.
Second-highest peak: K2 (Godwin Austen), Pakistan–China — 8,611 m.
Highest peak in India: Kangchenjunga — 8,586 m.
Highest peak in Africa: Kilimanjaro, Tanzania.
Highest in South America: Aconcagua, Argentina.
Highest in North America: Denali (McKinley), Alaska.
Highest in Europe (usual key): Mt Elbrus, Russia.
Longest mountain range on land: Andes (~7,000 km).
Highest mountain range: Himalayas.
Longest mountain chain on Earth: Mid-Ocean Ridge (underwater).
Highest plateau / Roof of the World: Tibetan / Pamir plateau.
Highest active volcano: Ojos del Salado, Chile–Argentina.
Largest volcano by volume/mass: Mauna Loa, Hawaii.
Tallest mountain base-to-peak: Mauna Kea, Hawaii.
Farthest point from Earth’s centre: Chimborazo, Ecuador.

Rivers, lakes, waterfalls, deserts, climate

Longest river (standard exam answer): Nile, Africa (~6,650 km).
Largest river by discharge/basin: Amazon.
Longest river in Asia: Yangtze (Chang Jiang).
Longest river in North America: Mississippi–Missouri.
Busiest commercial river in Europe: Rhine.
Largest delta: Ganges–Brahmaputra / Sundarbans.
Largest peninsula: Arabian Peninsula.
Largest hot desert: Sahara.
Largest desert overall: Antarctic Desert.
Largest cold desert in Asia: Gobi.
Driest place: Atacama Desert, Chile.
Wettest place often listed: Mawsynram, Meghalaya, India.
Hottest recorded place: Death Valley, USA (Furnace Creek, 56.7 °C); Al Aziziya, Libya in old keys.
Coldest recorded place: Vostok Station, Antarctica.
Highest waterfall (uninterrupted drop): Angel Falls, Venezuela (~979 m).
Widest waterfall: Khone Phapheng, Laos (Mekong).
Largest waterfall by volume: Inga / Boyoma (Congo) often listed; Iguazu/Niagara in some keys.
Largest saltwater lake: Caspian Sea.
Largest freshwater lake by surface: Lake Superior.
Largest freshwater lake by volume: Lake Baikal.
Deepest lake: Lake Baikal, Russia (~1,642 m).
Highest navigable lake: Titicaca, Peru–Bolivia.
Lowest lake / lowest land point: Dead Sea, Israel–Jordan (~430 m below sea level).
Lowest point in Africa: Lake Assal, Djibouti.
Lowest point in North America: Death Valley, USA.
Longest cave system: Mammoth Cave, Kentucky, USA.

Man-made structures
Tallest building: Burj Khalifa, Dubai — 828 m.
Tallest statue: Statue of Unity, Gujarat, India — 182 m.
Longest wall: Great Wall of China.
Longest railway: Trans-Siberian Railway, Russia.
Highest railway line / station: Qinghai–Tibet Railway; Tanggula station (~5,068 m).
Longest historic artificial canal: Grand Canal of China.
Longest ship canal linking seas without locks: Suez Canal (Panama has locks).
Busiest canal in older European keys: Kiel Canal.
Longest dam by length (Indian keys): Hirakud Dam, India.
Largest dam / hydro project by scale: Three Gorges Dam, China.
Tallest dam: Jinping-I, China (~305 m).
Longest road / highway system often listed: Pan-American Highway.
Longest road tunnel: Lærdal Tunnel, Norway.
Longest bridge in many keys: Danyang–Kunshan Grand Bridge, China (rail); Hong Kong–Zhuhai–Macau is a major sea crossing.
Largest railway station by platforms: Grand Central Terminal, New York (44 platforms).
Longest railway platform: Hubballi (Shree Siddharoodha Swamiji), Karnataka (replaced Gorakhpur in updated keys).
Largest library: Library of Congress, Washington D.C.
Largest stadium by capacity often listed: Rungrado 1st of May Stadium, Pyongyang.
Largest mosque by area/capacity: Masjid al-Haram, Mecca.
Largest church / basilica in many keys: St Peter’s Basilica, Vatican.
Largest temple complex: Angkor Wat, Cambodia.
Largest dome (classic Indian key): Gol Gumbaz, Vijayapura.
Tallest brick minaret (classic key): Qutub Minar, Delhi.
Largest airport by area in older keys: King Fahd / King Khalid, Saudi Arabia.
Busiest airport by passengers usually: Hartsfield–Jackson Atlanta.
Highest commercial airport: Daocheng Yading, China (some keys still say Lhasa/Bamda).
Largest museum (keys differ): Louvre, Paris, or British Museum / AMNH.

Animals, plants, space

Largest animal: blue whale.
Largest land animal: African bush elephant.
Tallest land animal: giraffe.
Fastest land animal: cheetah.
Largest bird: ostrich.
Smallest bird: bee hummingbird.
Fastest bird in a dive: peregrine falcon.
Fastest bird in level flight (older keys): spine-tailed swift.
Largest flying bird by wingspan: wandering albatross.
Largest flower: Rafflesia arnoldii.
Tallest tree: coast redwood Hyperion, California.
Largest planet: Jupiter.
Smallest planet: Mercury.
Hottest planet: Venus.
Nearest planet to the Sun: Mercury.
Farthest planet from the Sun: Neptune.
Brightest star in the night sky: Sirius.
Largest satellite of a planet: Ganymede (Jupiter).
Earth’s only natural satellite: the Moon.

Time and calendar

Longest day in the Northern Hemisphere: 21 June.
Shortest day in the Northern Hemisphere: 22 December.
Longest epic: Mahabharata.
International Date Line: 180° longitude (with zigzags).

Continent high / low

Asia highest: Everest (8,848.86 m). Asia lowest: Dead Sea.
Africa highest: Kilimanjaro. Africa lowest: Lake Assal.
North America highest: Denali. North America lowest: Death Valley.
South America highest: Aconcagua. South America lowest: Laguna del Carbón, Argentina.
Europe highest: Elbrus (Mont Blanc if Caucasus is excluded; papers usually say Elbrus). Europe lowest: Caspian Depression.
Australia highest (mainland): Kosciuszko. Oceania if New Guinea included: Puncak Jaya.
Antarctica highest: Vinson Massif. Antarctica lowest: Bentley Subglacial Trench (ice-covered).

India vs world extras

Highest mountain in India: Kangchenjunga (K2 is in PoK / Pakistan–China).
Tallest statue in the world: Statue of Unity.
Largest river island in the world: Majuli.
Largest delta (shared): Sundarbans.
Wettest place in the world (usual key): Mawsynram.
Longest dam by length (exam key): Hirakud.

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