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About Tamil Nadu

Tamil Nadu is the 10th largest state of India by area (130058 km2). It is surrounded by Puducherry, Kerala, Karnataka and Andhra Pradesh.

ISO 3166 Code

ISO 3166 code of Tamil Nadu is "TN".

Unesco World Heritage

- Group of Monuments at Mahabalipuram: It is a collection of 7th- and 8th-century CE religious monuments, located in Mahabalipuram, Chengalpattu district, Tamil Nadu.
- Great Living Chola Temples: It is a group of Chola dynasty era Hindu temples, located in Thanjavur city in Thanjavur district of Tamil Nadu.
- Nilgiri Mountain Railway: It is located in Nilgiris district of Tamil Nadu.
- Western Ghats: It is also known as Western Mountain range. It is spread over the states of Gujarat, Maharashtra, Goa, Karnataka, Kerala and Tamil Nadu.

1 GPO in Tamil Nadu

Chennai GPO [Chennai, 600001]