 Largest continent is Asia
 Largest ocean is Pacific Ocean
 Largest bay is Hudson Bay
 Largest country (area) is Soviet Union
 Largest dam is Grand Coulee Dam, USA
 Largest desert is Sahara (North Africa)
 Largest gulf is Gulf of Mexico
 Largest Volcano is Manuna Lea (Hawai)
 Longest Corridor is Rameshwaram Temple (India)
 Largest land animal is Africa bush Elephant
 Largest land animal is cheetah
 Largest island is Green land
 Largest Lake is Caspian Sea
 Largest fresh water Lake is Lake Superior
 Largest mountain range is Andes, South America
 Largest peninsula is Arabia
 Largest planet is Jupiter
 Largest railway station is Grand central terminal, New York City, USA
 Largest railway platform is Kharagpur, West Bengal, India
 Largest Animal is Blue Bottom whale
 Largest Country (Area) is Russia
 Largest Delta is Sunderban (India)
 Largest Desert is Sahara, North Africa
 Largest Dams is Grand Coulee Dam, USA
 Largest Hotel is Excalibur Hotel (Las Vegas, Nevada, USA)
 Largest Library is United States Library of Congress, Washington
 Largest Mosque is Jama Masjid, Delhi (India)
 Largest Mountain Range is Andes (South America)
 Largest Minaret is Sultan Hassan Mosque (Egypt)
 Largest Palace is Imperial Palace (China)
 Largest Park is National Park of North-Eastern (Greenland)
 Highest Lake is Titicaca (Bolivia)
 Highest Mountain Peak is Mount Everest (Nepal)
 Highest Mountain Range is Himalayas, Asia.
 Highest Plateau is Pamir (Tibet)
 Highest Road is Leh-Nobra, Ladakh division India.
 Highest Airport is Lhasa Airport, Tibet
 Highest mountain range is Himalayas, Asia
 Highest Mountain peak Mount is Everest, Himalayas, Nepal
 Highest Waterfall is Angel (Venezuela)
 Highest City is Wenchuan, China
 Highest waterfall is Salto angel falls, Venezuela
 Biggest Airbus is Double Decker A-380
 Biggest Flower is Rafflesia (Java)
 Biggest Museum is American Museum of NaturalHistory (New York).
 Biggest Telescope is Mt. Palomar (USA)
 Biggest Cinema House is Roxy, New York
 Biggest Oceans is Pacific Ocean
 Biggest Palace is Vatican (Rome)
 Smallest Bird is Humming bird
 Smallest country (area) is Vatican City
 Smallest continent is Australia
 Smallest planet is mercury
 Longest River is Nile, Africa
 Longest River Dam is Hirakud Dam, India
 Longest Train is Flying Scotsman
 Longest Epic is Mahabharata
 Longest Day is June 21
 Longest Bridge is Huey P. Long Bridge (USA)
 Longest Canal is Baltic Sea White Canal
 Tallest animal is Giraffe
 Tallest Building is Dubai Burj (Dubai)
 Tallest Minaret is Qutub Minar, Delhi (India)
 Tallest Fountain is Fountain Hills, Arizona
 Tallest Tower is C. N. Tower, Toronto (Canada)
 Tallest fountain is Fountain hills, Arizona
 Oldest Theatre is Teatro Olimpico (Itlay)
 Lowest Water Level is Dead Sea
 Lowest mountains is Bhesnna Bhaile
 Hottest Place is Azizia (Libya)
 Coldest Planet is Neptune
 Rainiest Place is Mosinram, near Cherrapunji (India)
 Lightest Gas is Hydrogen
 Deepest ocean is Pacifi Ocean
 Brightest planet is Venus
 Most populous country is China
 Least populous country is China
 Least populous country is Vatican City
 Nearest Planet (to the Sun) is Mercury
 Farthest Planet (from the Sun) is Neptune
 Deepest Lake is Baikal (Siberia)
 Most Populous City is Tokyo
 Shortest Day is December 22
 Widest waterfall is Khone Fall
 Deepest Oceans is Pacific Ocean
 Tallest Animal Giraffe
 Fastest Bird Swift
 Largest Bird Ostrich
 Smallest Bird Humming Bird
 Longest Railway Bridge Lower Zambesi (Africa)
 Longest Canal (Ship) Baltic White Sea Canal (152 miles)
 Highest City Wen Chuan (China) 16000 ft.
 Largest Continent Asia
 Smallest ContinentAustralia
 Highest Country Tibet (The Pamirs)
 Largest Country(in population) China
 Largest Country(in area) USSR, now CIS (Common Wealth of Independent States)
 Largest Day June 21 (Northern Hemisphere)
 Lightest MetalLithium
 Biggest Temple Angkor Vat,Kampuchia
 Wingless Bird Kiwi,New Zealand
 Hardest Substance Diamond
 Largest Animal Blue Whale,Recorded length 106 feet, Weight 195 tons
 Largest land-Animal African Elephant
 Biggest Flower Rafflesia (Java)Indonesia
 Largest Stadium Strahov Stadium in Praha,Czech Republic accommodation 240000 persons
 Largest Diamond Mine Kimbarley,south Africa
 Longest Corridor
 Rameshwaram TempleCorridor (5000 feet)
 Fastest Bird Swift
 Largest Bird Ostrich
 Smallest Bird Humming Bird
 Longest Railway Bridge Lower Zambesi (Africa)
 Longest Canal (Ship) Baltic White Sea Canal (152 miles)
 Highest City Wen Chuan (China) 16000 ft.
 Largest Continent Asia
 Smallest ContinentAustralia
 Highest Country Tibet (The Pamirs)
 Largest Country(in population) China

@Taimur,
Many thanks for sharing this well researched functional information.
It will be of great help to all the CSS aspirants.

Good times