Yala (Ruhuna) National Park: Yala National Park with an area of 1259 sq km is the biggest National Park in Sri Lanka. The Park is located 309 km south of Colombo on the southeast of the island and is divided into Yala West (also called Ruhuna) and Yala East. Yala West or Ruhuna National Park is one of the best parks in the world to observe and photograph leopards.
There are about 35 leopards in the park, which probably is the highest density anywhere in the world. Other animals that can be seen in the park are elephants, sloth bear, spotted deer, barking deer, mouse deer, toque monkey, mongoose and crocodiles. Yala East contains a large variety of water birds.
Gal Oya National Park: Gal Oya National Park is located 314 km away from Colombo in the Inginiyagala district. The Park has an area 260 sq km and is surrounded by the largest tank in Sri Lanka, which is the Senanayake Samudra. The park is renowned for its elephant population. There are about 150 elephants in the park. The best time visit the park is between March and July.