Largest in India

Largest Cave Temple	Ellora
Largest Mosque	Jama Masjid, Delhi
Largest State	Rajasthan
Largest Desert	Thar Desert (Rajasthan)
Largest Delta	Sunderbans (Mouth of the Ganges)
Largest Gurudwara	Golden Temple, Amritsar
Largest Lake	Wular Lake, Kashmir
Largest Museum	Indian Museum, Kolkata
Largest Planetarium	Birla Planetarium, Kolkata
Longest Railway Bridge	Vembanad Rail Bridge, Kerala
Highest Award for Gallantry (Military)	Param Vir Chakra
Highest Civilian Award	Bharat Ratna
Biggest Stadium	Yuva Bharati Stadium, Kolkata
Highest Mountain Peak	Kanchenjunga
Highest Waterfall	Vajrai Falls, Maharashtra
Longest Canal	Indira Gandhi Canal
Longest Dam	Hirakud dam on Mahanadi in Odisha
Longest Railway Platform	Kharagpur, West Bengal
Longest Train Route	Dibrugarh - Kanyakumari (4,273 km)
Longest River	Ganga
Longest Road	Grand Trunk Road
Largest Zoo	Zoological Gardens, Kolkata
Tallest/Highest Dam	Tehri Dam (Uttarakhand)
Heaviest Rainfall	Cherrapunji and Mawsynram (Meghala)
Most Populous city	Mumbai
Busiest Airport	Indira Gandhi International Airport, Delhi
Smallest District	Mahe (9 sq km)