The Cardamom Hills central point is about . They cover about 2,800 km2 of mountainous terrain with deep valleys, and includes the drainages of the west flowing Periyar, Mullayar and Pamba rivers. It includes Idukki Dam and Mullaperiyar Dam. They conjoin the Anaimalai Hills to the northwest, the Palani Hills to the northeast and the Pothigai to the south as far as the Aryankavu pass (at c. 9° N). The crest of the hills form the boundary between Kerala and Tamil Nadu. Anamudi (8,842 ft (2695 m)) in Eravikulam National Park, is the highest peak in Western ghats and also the highest point in India south of the Himalayas.