Idukki is a mountainous district in the Western Ghats, covered with tea, cardamom and spice estates. Munnar is the best-known hill station, and Eravikulam National Park nearby protects the Nilgiri tahr.
Thekkady and the Periyar Tiger Reserve lie in the south of the district, while the Idukki Arch Dam on the Periyar river is one of the largest arch dams in Asia.
