Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Chennai (86% of total searches to Tamil Nadu). The next most popular destinations are Ooty (6%) and Velankanni (5%). Searches for hotels in Coimbatore (3%) are also popular.
KAYAK users have found double rooms in Tamil Nadu for as cheap as $10 (Salem) in the last 3 days. The average price is $105.