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Tirunelveli (formerly Tinnevelly) is the largest district by area in Tamil Nadu.
Tamil Nadu adopted the Dravidian Model under C.N. Annadurai in 1965, focusing on social justice and indigenous Tamil culture.
The Kaveri River is the longest river in Tamil Nadu, spanning approximately 765 km, and is known as the 'Ganga of the South'.
Coimbatore has emerged as a secondary IT hub in Tamil Nadu, with growing investment in software and IT services industries.
The Grand Anicut, built by the Cholas across the Kaveri river, was designed for irrigation and flood control, demonstrating ancient Tamil engineering.
Periyar National Park is in Kerala's Idukki district but shares borders with Tamil Nadu's Theni district.
Ramanathapuram district experiences the least rainfall in Tamil Nadu, being in the rain shadow region of the Western Ghats.
Saint Thirunavukkarasu (Appar) and other Nayanars were key figures in the Tamil Bhakti movement, promoting devotional worship in Tamil Nadu.
Arjuna's Penance and the Group of Monuments at Mahabalipuram are UNESCO World Heritage Sites featuring rock-cut sculptures and caves from the Pallava period.
Tamil Nadu covers an area of approximately 127,724 sq km, making it the eleventh largest state in India by area.