[citation needed] The Thamirabarani River or Tamiraparni, flows through Kallidaikurichi & Ambasamudram.

Originating from the Pothigai malai (also known as Agasthiyamalai) part of the Agasthyamalai Biosphere Reserve, it flows down to the Gulf of Mannar Marine National Park in the Bay of Bengal after traveling for about 125 kilometers in Punnaikayal, a coastal town in Thoothukudi district.

[citation needed] Like most parts of Tamil Nadu, the climate here is rather hot, except during the rainy season of the November/December months.

The Manjolai area is deep within the Western Ghats, within the Kalakad Mundanthurai Tiger Reserve in the Tirunelveli District.

Located on top of the Manimuthar Dam and the Manimuthar Water Falls, the Manjolai area comprises tea plantations, small settlements around the plantations; Upper Kodaiyar Dam and a windy view point called Kuthiravetti.