In Ramayana, Lakshmana went to the Sarayu river, ended life by engaging in meditation and stopping his breathing. It is said his soul went to Patala Loka. Similar to this, white snake like creature came out from Balarama and Snake went to Patala loka. It is belived both of them were incarnations of Adisesha serpent. Why didn't their souls go to Vaikuntha and mingle with Adisesha serpent on which Lord Vishnu sleeps?
It is also said that Adisesha holds the Earth on its hoods. So, is the Earth located on one of its hoods? Where exactly does Adisesha live?