Maduru Oya National Park is located in the Eastern and Uva provinces of Sri Lanka among the four national parks established under the Mahaweli Development Project. There are two entrances located in Aralaganwila and Dambana the Wadha the aborigine people village. It is a well known elephant habitat.

Over 15% of the total area of the park is in water bodies include the Maduru Oya, Ulhitiya, Ratkinda, NDK, and Henanigala reservoirs, as well as the tributaries of the Mahaweli Ganga and Maduru Oya. The area is mostly tropical mixed evergreen forest, exhibiting such species as weera, burutha or satinwood, palu, welang , divul or wood apple, ehela and weliwenna.Fauna

Other than elephants, species of mammal include species of mammals, Sri Lanka sloth bear, Sri Lanka leopard, water buffalo, slender loris, toque monkey, Sri Lanka grey languor, Sri Lanka jackal, Indian fishing cat, wild boar, barking deer, Sri Lanka spotted dee, Endemic purple Monkey, Sambhur etc.

There are some endemic avifauna found within the park, aquatic birds also plentiful such as the painted stork or Tantalus, white-bellied sea eagle, spot-billed pelican, great cormorant, and little cormorant, Sri Lanka jungle fowl, the rare dollar bird or Broad Billed Roller, The Tailor Bird with its unique nest of leaves sewn together, the White Rumped Shama, Black Hooded Oriole.

Ruins or remains of Buddhist shrines within the park including ancient temples, dagobas and statues belonging to different eras of Sri Lankan history.