I remember reading that there is an entire city somewhere off the coast of the southern tip of India that wasn’t found until recently by divers...............
There’s Dwarka (actual ruins down there) in the west, there’s the submerged land bridge out to Sri Lanka, and during the Boxing Day tsunami, a submerged city off the east coast was temporarily visible. :^o
https://www.cbsnews.com/news/tsunami-revealed-lost-indian-city/
https://www.amusingplanet.com/2017/06/ramas-bridge-bridge-built-by-monkeys.html