Highest, Longest, Largest, Tallest, Smallest etc... in India

Significance	Achiever
Highest mountain peak	Godwin Austin (k2)
Highest Dam	Tehri Dam, Uttarakhand
Highest Waterfall	Kunchikal waterfall, Karnataka
Highest Gateway	Buland Darwaza, Fatehpur Sikri, Uttap Pradesh
Highest Award	Bharat Ratna
Highest Gallantry Award	Paramveer Chakra
Highest Battle field	Siachin Glacier
Highest rainfall Place	Mawsynram, Meghalaya
Highest    Airport	Leh, Laddakh
Highest Lake	Cholamu Lake, Sikkim
Highest Tower	Qutub Minar, Delhi
Highest populated State	Bihar
Highest Radio Station	The Leh station of AIR
Highest Statue	Jain Saint Gomateswara, Karnataka
Largest lake of Fresh water	Wular lake, Kashmir
Largest Temple	Sri Ranganathaswamy Temple, Tamil Nadu
Largest Mosque	Jama Masjid, Delhi
Largest Church	Se Cathedral, Goa
Largest Gurudwara	Golden Temple, Amritsar
Largest Monastery	Tawang Monastery, Arunachal Pradesh
Largest populated city	Mumbai, Maharastra
Largest Building	Rashtrapati Bhawan, Delhi
Largest Museum	National Museum, Kolkata
Largest Auditorium	Sri Shanmukhananda Hall, Mumbai
Largest Cinema Theatre	Thangam, Madurai
Largest Barrage	Farakka Barrage, Ganga
Largest Delta	Sunderban Delta, West Bengal
Largest Dome	Gol Gumbaz, Bijapur, Karnataka
Largest Zoo	Zoological Gardens, Alipur, Kolkata
Largest Exhibition Ground	Pragati Maidan Complex, New Delhi
Largest Desert	Thar, Rajasthan
Largest cave temple	Kailash temple, Ellora, Maharashtra
Largest Cave	Amarnath Cave, Jammu and Kashmir
Largest Hotel	Oberoi –Sheraton, Mumbai
Largest State by Area	Rajasthan
Largest State by Population	Uttar Pradesh
Largest Hospital	B. J Medical College and Civil Hospital, Ahmedabad
Largest corridor	Rameshwaram temple corridor, Tamil Nadu
Largest Post Office	Mumbai GPO
Largest forest area state	Madhya Pradesh
Largest Prison	Tihar Central Jail, Delhi
Largest Stadium	Salt lake Stadium, Kolkata
Largest Port	Mumbai
Largest Lake of Saline water	Chika lake, Orissa
Largest river island	Majuli, Brahmaputra river, Assam
Largest Planetarium	Birla Planetarium, Kolkata
Largest man-made lake	Govind Sagar, Bhakra Dam
Largest Cantilever Span Bridge	Howrah Bridge, Kolkata
Largest library	National Library, Kolkata
Largest Lok Sabha Contituency by area	Ladhak
Largest Lok Sabha Contituency by population	Outer Delhi
Longest River	Ganga
Longest tributary river of India	Yamuna
Longest coastline State	Gujarat
Longest tunnel	Jawahar tunnel, Jammu & Kashmir
Longest national highway	NH-7which runs from Varanasi to Kanyakumari
Longest Dam	Hirakud Dam, Orissa
Longest River Bridge	Mahatma Gandhi Setu, Patna
Longest Electric railway line	From Delhi to Kolkata via Patna
Longest Railway Platform	Kharagpur, W. Bengal
Longest river which forms estuary	Narmada
Logest bridge above water	Bandra-Worli Sea Link, Maharastra
Logest distance run train	Vivek Express
Longest nonstop run train	Trivandrum Rajdhani
Longest railway bridge	Vembanad Rail bridge, Kerala
Longest Beach	Marina Beach, Chennai
Smallest State by Area	Goa
Smallest State by Population	Sikkim
Smallest Lok Sabha Contituency by area	Chandni Chowk
Smallest Lok Sabha Contituency by population	Lakshdweep
Tallest building	Imperial Tower, Mumbai