Kumari Kandam is an colony by a mystically tinged branch of Tamil nationalism who hold a submerged country (Sri Lanka to Australia and as far west as Madagascar) in the Indian Ocean is their lost homeland. The Lemuria of this reality fits the bill but the colony is having problems as mundane necessities like farming and exploration are shunned and schisms in the movement.
Reference[]
- Infinite Crossroads-12, "Lemuria" by Paul Drye (Pyramid 2; 0216.html)