This is really mind blowing for some real religionist.
It is mentioned in the epic Ramayana that Ram Setu was built by the son of Lord Vishwakarma when Lord Rama needed to cross the sea to reach Lanka. The bridge known as Adam's Bridge is said to be built of floating stones. The epic mentions that whenever the name of Lord Rama was written over any stone, it started to float in the sea water.
Some such stones are said to be scattered at Rameswaram during the Tsunami