Kumari Kandam is a legendary sunken landmass to the south of Kanyakumari, at the tip of South India. Kumari Kandam has often been compared and identified with Lemuria in modern times.
According to Tamil Tradition, the Dravidians originally came from a submerged island, Kumari kandam, to the South of India. According to the legend, there were two main rivers in Kumari Kandam, the Pagruliyaru and Kumari River. There were also mountains. The second Tamil Sangam, Idai Sangam, was said to have been held on the now submerged land. Also in Ayyavazhi mythology, the Akilattirattu Ammanai tells about a sunken land at about 152 miles either south or south-east to Kanyakumari, with 10008 streets. It also claims that the Center of Origin of Human beings as the sunken land or the land surrounding it.
The 'kadal kol' (land swallowed by sea) may not be totally fictitious. Several earthquake-caused tsunamis, mistaken for sinking, may have destroyed the island over a period of time.
Below is the link to the tentative map