Sri Lanka is one of the best places in the world to see blue whales in their natural habitat. Sperm whales, killer whales, pilot whales and dolphins are also regularly spotted on whale watching trips organized from Mirissa on the south coast. Since the continental shelf is at its narrowest close to Dondra Head, Sri Lanka's southernmost point, the deep water provides ideal feeding ground for migrating whales from November to April. srilanka.travel