Highest, Longest, Largest, Tallest, Biggest in India

Longest river	Ganges (2525 km)
Longest Road bridge	Mahatma Gandhi Setu (Patna)
Highest mountain peak	Godwin Austin (k2)
Largest lake (Fresh water)	Wular lake (Kashmir)
Highest Dam	Tehri Dam on Bhagirathi River
Largest Mosque	Jama Masjid, Delhi
Longest Road	Grand Trunk Road
State with longest coastline	Gujarat (1200 k.m )
Largest railway route	Dibrugarh in Assam to Kannyakumari in Tamil Nadu
Longest tunnel	Jawahar tunnel (Jammu & Kashmir)
Longest national highway	NH-7 which runs from Varanasi to Kanyakumari
Longest Dam	Hirakod Dam (Orissa)
Longest River Bride	Mahatma Gandhi Setu, Patna
Longest populated city	Mumbai (1.60 crore)
Largest Museum	National Museum, Kolkata
Largest Delta	Sunderban Delta, W. Bengal
Largest Dome	Gol Gumbaz, Bijapur (Karnataka)
Largest Zoo	Zoological Gardens, Alipur, Kolkata
Largest man-made Lake	Govind Vallabh Pant Sagar (Rihand Dam)
Largest Desert	Thar (Rajasthan)
Highest Tower	Pitampura Tower, Delhi
Smallest State (Area)	Goa
Smallest State (Population)	Sikkim
Highest Waterfall	Gersoppa waterfall (Karnataka)
Longest Electric railway line	From Delhi to Kolkata via Patna
Densest populated State	West Bengal
Largest cave temple	Kailash temple, Ellora (Maharashtra)
Largest animal Fair	Sonepur (Bihar)
Highest Gateway	Buland Darwaza, Fatehpur Sikri (Agra)
Biggest Hotel	Oberal –Sharaton (Mumbai)
Largest State (Area)	Rajasthan
Largest State (Population)	Uttar Pradesh
Place of heaviest rainfall	Mausinram (Meghalaya)
Largest corridor	Rameshwaram temple corridor (Tamil Nadu)
Largest cantilever span bride	Howrah Bridge (Kolkata)
Largest forest state	M.P.
Highest straight gravity Dam	Bhakra Dam
Longest Railway Platform	Kharagpur (W. Bengal)
Largest Stadium	Salt lake (Yuva Bharti), Kolkata
Largest Port	Mumbai
Highest Lake	Devatal (Garhwal)
Largest Lake (Saline water)	Chika lake, Orissa
Highest civil Award	Bharat Ratna
Highest Gallantry Award	Paramveer Chakra
Largest Gurudwara	Golden Temple, Amritsar
Deepest river valley	Bhagirathi & Alaknanda
State with longest coastline of South India	Andhra Pradesh
Longest river which forms estuary	Narmada
Largest Church	Saint Cathedral (Goa)
Longest Beach	Marina Beach, Chennai
Highest Battle field	Siachin Glacier
Highest  Airport	Len (Laddakh)
Largest river island	Majuli (Brahmaputra river, Assam)
Largest Planetarium	Birla Planetarium (Kolkata)
Animal, Tallest	Giraffe
Archipelago, Largest	Indonesia
Bird, Fastest	Swift
Bird, Largest	Ostrich
Bird, Smallest	Humming Bird
Canal, Longest Irrigational	The Kalakumsky Canal
Capital, Highest	La Paz (Boliva)
Delta, Largest	Sunderban (Bangladesh & India)
Diamond, Largest	The Cullinan
Epic, Largest	Mahabharat
Irrigation Scheme, Largest	Lloyd Barrage, Sukkur (Pakistan)
Sea, Largest	Mediterranean sea
Lake, Highest	Titicaca (Bolivia)
Place, Coldest (Habitated)	Verkhoyank (Siberia)
Place, Rainiest	Mausinram (Meghalaya, India)
Planet, Biggest	Jupiter
Planet, Brightest	Venus
Planet, Smallest	Mercury
Plateau, Highest	Pamir (Tibet)
Platform, Longest	Kharagpur (India)
Railway, Longest	Trans-Siberian railway
Tallest statue	Sardar Vallabhbhai Patel (Gujarat)will stand at 597ft.
Tallest minar in India	Qutub Minar
Second longest river in India	Godavari (1465)
Longest canal in India	Indira Gandhi Canal (650 km)
highest water falls in India	Jog water falls (253 meters (829 ft).
Longest railway tunnel in India	Pir Panjal 11-km