Meghamalai is a hidden gem located in the Western Ghats mountain range. It is perfect for nature enthusiasts as it is surrounded by lush greenery, waterfalls and tea plantations. If you're lucky, you might even spot some wildlife like wild bisons and elephants. You can either trek around Meghamalai or take a jeep tour to explore the area. Highwavys Dam and Suruli Falls are also some nearby attractions worth visiting.
Start your day by heading to the Sothuparai Dam, which offers scenic views and is a popular spot for fishing. Next, visit the Kumbakkarai Falls, a beautiful waterfall with several natural pools where you can take a dip. If you're interested in history, visit the Archaeological museum in Chinnamanur, which contains ancient artifacts and also provides an insight into the local culture. End your day by tasting the local cuisine at a restaurant in Chinnamanur.
If you have more time, you can consider visiting Periyar Wildlife Sanctuary, which is just a 2-hour drive from Theni. It is home to several endangered species like tigers, elephants, and lion-tailed macaques. You can also take a boat ride on the Periyar river.
If you have less time, you can skip Chinnamanur and visit Vaigai Dam and Nature Park, which are located just 30 minutes away from Theni.