The park is located entirely within Sri Lanka’s dry zone, although its southern edge borders on the intermediate zone. The area is tropical dry, boxed evergreen forest. The rare and endemic tree, vatica obscura, the only species of the Dipterocapaceae to occur in the dry zone, is found in only one location on the banks of the Madury Oya and Gallodai Aru.
Degradation of the pre-Cambrain rock has resulted in the formation of a mature mantle broken up by a number of prominent rock outcrops and ridges. The topographic feature is the 8km long range of rocky mountains in the south west of the park. The area of park is 58,7850ha. The park was extended in the east from its original size of 51,468ha on September 16, 1985 in order to provided additional habitat for wildlife and to ensure protection of the immediate catchments of the NDK reservoir. Conditions are influenced largely by the northeast monsoon, or Maha, which lasts from October to late January. Mean annual rainfall is 1,650mm. Annual evapotranspiration rates normally exceed precipitations levels and mean annual temperature is about 27°C.
The new park is designed to protect the immediate catchments of five reservoirs developed under the Accelerated Mahaweli Development Programme. The park area provided refuge for wildlife. The park lies between the Poloinnaruwa-Batticalo road and Mahiyangana-Padiyathalawa road in the districts of Ampara Buddulla and Polonnaruwa and spans the border between Eastern and Uva provinces.
- Day Visit charge for foreign adult - 10.00 U.S. Dollars or its equivalent in Sri Lanka rupees-
- Overnight Visit charge for foreign adult - 20.00 U.S. Dollars or its equivalent in Sri Lanka rupees-
- Day Visit charge for child (6-12yrs) - 5.00 U.S. Dollars or its equivalent in Sri Lanka rupees-
- Overnight Visit charge for child (6-12yrs) - 10.00 U.S. Dollars or its equivalent in Sri Lanka rupees