Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Chennai (65% of total searches to Tamil Nadu). The next most popular destinations are Coimbatore (19%) and Ooty (10%). Searches for hotels in Madurai (6%) are also popular.
KAYAK users have found double rooms in Tamil Nadu for as cheap as $13 (Chennai) in the last 3 days. The average price is $78.