Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Chennai (84% of total searches to Tamil Nadu). The next most popular destinations are Mahabalipuram (6%) and Ooty (5%). Searches for hotels in Coimbatore (5%) are also popular.
KAYAK users have found double rooms in Tamil Nadu for as cheap as $7 (Pollachi) in the last 3 days. The average price is $68.