Largest Diamond The Cullinan Diamond, South Africa
Largest Mosque Masjid al-Haram, Mecca, Saudi Arabia
Largest Park Northeast Greenland National Park
Largest Palace the Istana Nurul Iman in Brunei
Largest sea-bird Wandering Albatross
Largest Volcano Mauna Lao (Hawaii)
Highest Volcano Ojos del Salado, Andes, Argentine-Chile
Largest Mammal Whale
Largest Church The Basilica of Our Lady of Peace in Yamoussoukro, Côte d’Ivoire
Largest Temple Angkor Vat (Cambodia)
Longest Railway Trans-Siberian Railway (5,772 miles long)
Broadest Strait Davis Strait (Greenland and Baffin Island, Canada)
Narrowest Strait Chaliks in the Aegean Sea)
Longest Strait Strait of Malacca
Brightest Star Sirius A (also called Dog-Star)
Largest Bell (World) Greatest Bell of Moscow (Russia)
Largest Sea (inland) Caspian Sea (143,200 sq. miles)
Country with maximum adjoining borders China (13 Countries)
Largest City in Population (World) Tokyo
Largest Lake (Freshwater) Lake Superior, U.S.A
Largest Lake (Saltwater) Caspian Sea (371,000 sq.)
Largest Zoo by land area Hwange National Park in Zimbabwe
Largest zoo by species and number of animals The Henry Doorly Zoo in Omaha, Nebraska
Longest Day June 21 (in the Northern Hemisphere)
Longest Desert (World) Sahara, Africa (84, 00,000a sq. km.)
Longest Epic The Mahabharata
Longest River Nile (6690 km), Amazon (6570 km.)
Longest Tunnel (Road) Laerdal, Norway
The longest road tunnel in India Dr. Syama Prasad Mookerjee Tunnel, formerly known as the Chenani-Nashri Tunnel.
Longest Canal (India) The Indira Gandhi Canal
Longest Road in India Grand Trunk Road
Longest Big Ship Canal Suez Canal (Linkin red sea & Mediterranean)
Biggest Cinema House Kinepolis-Madrid Ciudad de la Imagen megaplex
Largest City (administrative area) Chongqing, China
Largest Urban Area Tokyo, Japan
Biggest Library by Number of Items Library of Congress (Washington D.C., USA)
Biggest Library by Physical Space British Library (London, UK)
Biggest Museum The Louvre, Paris
Deepest & Biggest Ocean The Pacific
Biggest City (in area) New York (8,683 sq. km.)
Driest Place Atacama Desert (South America)
Biggest Flower Rafflesia arnoldii
Largest Planet Jupiter
Brightest and Hottest Planet Venus
Farthest Planet (from the sun) Neptune
Biggest Clock tower (World) Makkah Royal Clock Tower overlooking Mecca’s Grand Mosque
Tallest Building Burj khalifa, Dubai (U.A.E)
Tallest statue The Statue of Unity
Tallest Tower Skytree, Tokyo, Japan. (634m)
Highest Waterfall Salto Angel Falls (Venezuela)
Highest Straight Gravity Dam Bhakhra Dam (India)
Tallest Active Geyser Steamboat Geyser, Yellowstone National Park, USA
Lightest Gas Hydrogen
Largest Archipelago Malay Archipelago, Indonesia
Largest Gulf Gulf of Mexico Shoreline 2100 miles
Lightest Metal Lithium
Hardest substance (comes from meteorites) Lonsdaleite
Hardest Natural Substance (found on earth) Diamond
Lightest Gas Hydrogen
Highest Melting Point Tungsten, 3422°C
Countries with Longest Border US and Canada
Fastest Bird Peregrine falcon, 320 km/h (200 mph)
Fastest Animal Cheetah
Smallest Bird Hummingbird
Smallest Continent Australia
Shortest Day Dec. 22 (in the Northern Hemisphere)
Smallest country Vatican City
Smallest planet Mercury
Largest Planet Jupiter
Smallest planet Mercury
Nearest Planet (to the sun) Mercury
Farthest Planet (from the sun) Neptune
Brightest and Hottest Planet Venus
Brightest Star Sirius
Smallest country Vatican City
Biggest Bell Great Bell at Moscow
Highest Straight Gravity Dam Bhakra Dam
Largest River Basin Amazon Basin
Largest Bird Ostrich
Largest Coral Formation The Great Barrier Reef
Longest life span of an animal 190 to 200 years (Giant Tortoise)
Highest Lake Lake Titicaca
Largest Lake The Caspian Sea
Largest Lake (Fresh Water) Lake Superior
Smallest Continent Australia
Largest Continent Asia
Largest Country (in area) Russia
Largest Bay Hudson Bay, Canada
Highest Capital City La Paz Bolivia
Largest Gulf Gulf of Mexico, Shoreline
Deepest and Biggest Ocean The Pacific
Largest Desert (world) Sahara Africa
Largest Delta Sundarbans, India
Longest Corridor Rameshwaram Temple’s Corridor (5000 feet)
Highest Plateau Pamir
Largest Gorge Grand Canyon
Busiest Port in the world Shanghai Port, China
Largest Lake (Artificial) Lake Kariba, Zambia and Zimbabwe
Longest Mountain Range Andes
Tallest Active Geyser Steamboat, Giant Yellowstone Park U.S.A
Longest River Dam Hirakud Dam (Odisha)
Longest strait Strait of Malacca
Largest Peninsula Arabia
Largest Island Greenland
The largest national park Northeast Greenland National Park
Largest Asian Desert Gobi, Mongolia
Longest Animal Blue Whale
Largest Land Animal African Bush Elephant
Longest Jump Animal Kangaroo
All the Largest/longest/Smallest of India
Largest freshwater lake Wular (J & K)
Largest state Rajasthan by area
Uttar Pradesh by highest population.
Largest museum Indian Museum (Kolkata)
Largest zoo Zoological Garden (Karnataka)
Largest dome Gol Gumbaz (Karnataka)
Largest desert Thar (Rajasthan)
Largest River island Majuili (Brahmaputra)
Largest monastery Tawang Monastery (Arunachal Pradesh)
Largest cave temple Ellora (Maharashtra)
Largest animals fair Sonepur fair (Bihar)
Largest river in South India Godavari
Largest prison Tihar Jail complex in New Delhi
Largest planetarium Birla Planetarium, Kolkata
Largest GPO Mumbai GPO
Largest church St. Cathedral (Old Goa)
Largest exhibition ground Pragati Maidan (New Delhi)
Largest arch dam Idukki dam (Kerala)
Largest library National Library (Kolkata)
Longest river Ganga
Longest dam Hirakud (Orissa)
Longest corridor Rameswaram Temple
Busiest port in India Mundra Port, Gujarat
Longest national highway N.H. 44
Smallest state (Area) ` Goa
Smallest state (Population) Sikkim
Smallest state (forest area) Haryana
Smallest Union territory Lakshwadeep
Most densely populated state West Bengal
The least densely populated state Arunachal Pradesh
Most populated city Mumbai
The largest national park in India Hemis National Park in Ladakh
Oldest Refinery Digboi (Assam)
Most literate Union Territory Lakshadweep
Least Populated Union Territory Lakshadweep
Sir, Is not Bihar the most densely populated state as per the census of 2011 ?