Its a heritage to India.. Whether it is man made or natural..
Pitcures of the Sethu itself is so glorious.
Nasa has earlier estimated the bridge to be 17 Lakh Years Old.. and this in it self takes to the treta Yugh when Ram was born.
All scriptures on Ramayana says that Ram started the journey to Lanka from Rameshwaram. How can it be a coincidence that this sethu is also from Rameshwaram to Lanka by the shortest root as per the pictures.