Ram Setu

Adam's Bridge, also known as Rama's Bridge or Rama Setu, is a chain of natural limestone shoals between Pamban Island, also known as Rameswaram Island, off the south-eastern coast of Tamil Nadu, India, and Mannar Island, off the north-western coast of Sri Lanka. Geological evidence suggests that the bridge was formerly a land connection between India and Sri Lanka. The feature is long and separates the Gulf of Mannar (southwest) from the Palk Strait (northeast). Some regions of the bridge are dry, and the sea in the area rarely exceeds in depth, making it quite difficult for boats to pass over it. Etymology Ibn Khordadbeh's Kitāb al-Masālik wa-l-Mamālik refers to the structure as Set Bandhai (lit. Bridge of the Sea). Al-Biruni's Tārīkh al-Hind was probably the first to use the name Adam's Bridge. This appears to have been premised on the Islamic belief that Adam's Peak — where the biblical Adam fell to earth — is located in Sri Lanka, and that Adam crossed over to peninsular India via the bridge after his expulsion from the Garden of Eden. The ancient Sanskrit epic Ramayana (8th century BCE–3rd century CE) mentions a bridge constructed by the god Rama to reach the island Lanka and rescue his wife Sita from Ravana. In popular belief, Lanka is equated to present-day Sri Lanka and the bridge is described as "Rama's Setu".