The eternal rhythm of the gurgling, cascading waterfalls and dams resound in many parts of Tamil Nadu. Ecology is well preserved in the waterfalls around Tamil Nadu. There are several waterfalls and dams around Tamil Nadu that are good tourist attractions. 

Tamilnadu Waterfalls & Dams

Courtallam Waterfalls

The 'Spa of South' is situated at an elevation of 167mts in the Western Ghats. This is a popular health resort. Its waterfalls are known for their curative and recuperative properties. It is situated about 160 kms. south of Madurai. A shower in the cascading waters is a great experience. There are nine waterfalls here, Main falls, Chitraruvi, Shenbagadevi falls, Honey falls, Five falls, Tiger falls, Old falls, Fruit farm falls and the New falls.Its bracing season extends particularly from June to September. Excursions : Tiruchendur Murugan Temple(99kms), Tirunelveli(58kms), Krishnapuram(68kms), Tenkasi(5kms) and the Mundanthurai Tiger Sanctuary(75kms). 

Hogenakkal means " Smoking Rock" has got the name because of the smoke like appearance created by the spray of the plunging waters of River Kaveri at this spot. The falls, the rugged scenery and the enchanting natural attractions have made it an ideal holiday spot. It is a health resort known for its waterfalls with medicinal properties, set amidst lush green woods. 'Parisal' (a boat made of palm fibre) ride through River Cauvery will be a pleasant experience. Hogenakkal is famed for the curative power of its waters. Surrounded by mountains, this place now offers a quiet holiday in comfort.It is 65 kms. from Salem.
Hogenakkal Waterfalls
Attaru" river passes through the Elagiri hills and falls from 30 mtr. height at Jadaiyanur on the other side of the hills. This could either be reached from Tiruppthur(15 kms.) or by an hour's trek from the hills. Adjacent to the Jalagambarai falls, there is a Murugan temple located within a building constructed in the shape of a lingam.
Jalagamparai Water Falls
An amazing feat of Nature, the Kumbakkarai Falls is yet another jewel in the crown of Tamil Nadu's tourist attractions. Comparatively less known, these falls offer a breath taking view of the fascinating interaction between gushing water and solid rocks. Add a verdant and wild backdrop and you have an exquisite sight. Situated on the foothills of the Kodaikanal hills, the falls are located 8 kms from Periyakulam. The water from these falls is full of the goodness of minerals and herbs. There are two stages in these falls. At the first stage water gathers in huge rocks recesses which are variously named after wild animals such as tiger, elephant, snake etc., before falling as the main fall.
Kumbakkarai Falls
The Suruli falls which falls from a height of 150 feet gathers into a pool, flows for a short distance and again plummets to a depth of 40 feet , offering a spectacular sight of nature's raw and wild beauty. The dense forests that surround it provide an awesome backdrop. Facilities are available for men and women to bathe separately in these falls. The special feature of the fall is that it is a "round the year" falls. However the best season to visit is June - October, when the thickness of the water column is astounding. The beauty of this fall finds mention in Tamil Epic, Silappathikaram written by poet Ilango. 
Cloud Land Falls popularly known as Chinna Suruli is situated 54 kms from Theni near Kombaithozhu village. These falls originate in the Megamalai. Tiger Falls is a dainty fall on the route to Munnar between Bodi and Bodimettu from Theni.
Suruli & Chinna Suruli Falls
Water Falls In Yercaud
Killiyur Falls is a 90-foot high waterfalls is situated amidst picturesque surroundings in Yercaud. Akasagangai waterfalls is on Kolli hills which is known for medical herbs and plants. 
Killiyur Falls
Water Falls in and around Ooty
Kalhatty Water Falls, is located on the Kalhatty slopes and about 13 kms. from Ooty. Law's falls(7kms.) is situated in the Ghat RF of Coonoor forest range. the height of the falls is about 180 feet. St.Catherine Falls, located at 8 kms, the enoviron of the falls has beautiful scenery.
Kalhatty Water Falls
Fairy Falls, is a delightful picnic spot just 5kms away from Kodai Lake. It is a wondrous waterfall. Silver Cascade is 8kms from Kodai lake. The overflow of Kodai Lake comes down here as a 180 foot high waterfall. Thalaiyar falls also known as Rat Tail falls, is one of the higest waterfalls in the world(975 foot high). It can be seen while climbing the Ghat Road to Kodaikanal from Kodai Road. It is not possible to visit this spectacular waterfall, as there is no approach route to this site. 
Water Falls in and around Kodaikkanal
Fairy Falls