Highest in India.

[nesan]

Highest airport -Ieh in laddakh.
Highest battle field-siachin glacier.
Highest dam-Bhakara dam
Highest peak -Mount everest.
Highest lake-Devtal lake in gadhwal.
Highest award-Bharat ratna.
Highest waterfall-Gersoppar waterfall in Mysore.
Highest rainfall-Mausinram in cherrapunji.

[koushik]

Bro if you posted the highest in terms means it will be more interesting

[nesan]

Largest state in terms of area in india-Rajasthan.
Largest state in terms of population in india-Uttar pradesh.
Denseset population in india-West bengal.
Largest cave in height in india-Amarnath.
Largest cave temple in india-Kailash temple.