Udawalawe created a watershed; the Udawalawe Reservoir. It was built for the refuge of Asian elephants in Sri Lanka located just south of the central mountains.
There it has extensive stretches of grassland as well as scrub jungle and riverine forest.
It’s the best in the continent for the protection and for observing Asian elephants in the wild.
Elephant sightings are even guaranteed when you only go on a safari drive.