Rama’s Bridge or Rama Setu is a chain of limestone shoals, between Rameshwaram Island, Geological evidence suggests that this bridge is a former land connection between India and Sri Lanka. The bridge is 50 km long and separates the Gulf of Mannar from the Palk Strait. Some of the sandbanks are dry and the sea in the area is very shallow, being only 1 to 10 metres (3 to 30 ft) deep in places, which hinders navigation. It was reportedly passable on foot up to the 15th century until storms deepened the channel. temple records seem to say that Adam’s Bridge was completely above sea level until it broke in a cyclone in 1480. The studies under “Project Rameshwaram” of the Geological Survey of India (GSI), which included dating of corals, indicate Rameshwaram Island evolved beginning 125,000 years ago. Radiocarbon dating of samples in this study suggests the domain between Rameshwaram and Talaimannar may have been exposed sometime between 7,000 and 18,000 years ago. Thermo Luminescence dating by GSI concludes that the sand dunes between Dhanushkodi and Adam’s Bridge started forming about 500–600 years ago. Ramayana by Valmiki speaks of a bridge, Setu bandhanam, a bridge over the ocean connecting India with Sri Lanka, the land of Ravana, the ruler of men and god. The epic attributes the building of the bridge to the ape army of Rama, who was assisting him in his war against Ravana to win back his wife, Sita. The earliest map that calls this area by the name Adam’s bridge was prepared by a British cartographer in 1804, in reference to an Abrahamic myth, in which Adam used the bridge to reach a mountain, which the British identified with Adam’s Peak, where he stood repentant on one foot for 1,000 years, leaving a large hollow mark resembling a footprint. Wrapped in legend and historical misjudgements, a diverse range of opinion and confusion exist about the nature and origin of this structure even today. In the 19th century, two prevalent theories explained the formation of the structure. One considered it to be formed by a process of accretion and rising of the land, while the other surmised that it was formed by the breaking away of Sri Lanka from the Indian mainland. Due to its connection with the Legend of Rama and Hindu belief Hindus hold the Adam’s Bridge in reverence, abhorring the Indian government’s proposal to dredge the bridge to create a shipping canal, known as Sethu Samudram. In 2001, the Government of India approved a multi-million dollar Sethusamudram Shipping Canal Project that aims to create a ship channel across the Palk Strait by dredging the shallow ocean floor near Dhanushkodi. The channel is expected to cut over 400 km off the voyage around the island of Sri Lanka. This proposed channel’s current alignment requires dredging through Rama’s Bridge, a proposal, which was met with strong opposition by the Hindus of India. Contradicting the Hindu sentiment Sri Lankans believe that the bridge was a construction of Ravana himself employing floating rocks, the rocks made of weightless corals, as claimed by Sri Lankan historians hold that the bridge was a collapsible structure made to cross the sea to reach India when required.