Source Wikipedia attached.
Oddanchatram is popular for Gandhi Vegetable market, which is one of the largest vegetable market in Asia. This market is situated 650m away from Oddanchatram railway station and very near to bus stand.
This Town known as the vegetable city of Tamil Nadu.
Also 2nd largest vegetable market in Tamil Nadu next to Chennai Koyambedu Vegetable market. ...
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This town also holds a Curd Market.