Ah, you have been so brianwashed by religion dude. OK anyway let me reply to your question. ,ram setu or adma's bridge is a "land bridge", do you really fckng believe floating stones made by fckng monkeys? technically it is just a "limestone shoal". You can search Google to learn about "shoals". There are many types of shoals seen around the globe.
In the book of Persian geographer Ibn Khordadbeh, he refers to Set Bandhai ( Bridge of the Sea) Interestingly, some Islamic sources talk about an Adam's peak in Srilanka, where Adam fell down to earth and it through this bridge he crosses from Srilanka to The main subcontinent, so this bridge is also called as Adam's bridge.
There are many amazing things that are naturally formed due to various geological porcesses but sometimes they closely resembles as man-made,thats the beauty of nature (and the science behind it).
And almost all older versions of ramayana, real scholars hav found evidences that helped to the identification of Lankapura no further south than the Godavari River. Eminent historian H.D. Sankalia locate the Lanka in this story somewhere in the eastern part of present day Madhya Pradesh. It is only in the later modern versions of the story ramayana people started to associate the Lanka in the story to present day Srilanka. And the rise of religious politics and religious (educated) people who tried to associate religious stories with relaity. (this phenomenon can be seen in almost all religious societies)
The Archaeological Survey of India and the government of India informed the Supreme Court of India in a 2007 affidavit that there is no proof of the bridge being built by Rama.
Only the modern day right wing (religious fanatics) try to assosiate religious stories with science just to make it more digestible, thus making people like you belive in such shit.
You have been watching too much mystery channels on YouTube dude.watch some scientific channels as well.
And do you still believe you are born as a hindu/muslim/christian/whatever??
The day you came our of your mom, you were a human being, it was your family/parents who shaped your religious ideology. You were same as millions of babies born on the same day as you were born, a mere mortal human being.
Religious stories, are just stories, don't consider it to be real. It is very interesting to find geological/scientific/historic evidences related to many things written in almost all religious stories and one can easily imagine the culture and thinking of the ancient human beings.