Rawhiti Cave become increasingly finer deeper down into the cave. A short walking track leads halfway down into the cavernous opening to a viewing platform. The diverse twilight-zone flora near the entrance of Rawhiti Cave makes this cave nationally significant. Over long periods of time, plant growth on the cave formations causes them to grow towards the sunlight as more calcium carbonate is deposited regularly on top of the plant growth. This phenomenon, called phytokarst, is most evident on the larger stalactites near the cave entrance, which are strongly curved outwards due to the heavy moss and fern growth on their sunlit
Sittanavasal Cave ASI) were applied over dry plaster surfaces without any adhesive grove; the process involved a chemical reaction of lime water which absorbed oxygenin the air and getting converted by a carbonisation process into insoluble calcium carbonate, which enabled the pigments to adhere to the surface. At the initiative of Pudukkottai State, during 1937–39, the paintings were cleaned, and then given a preservative coating. Also, the damaged portions of the plastering were injected with cementing material and the paintings were also retouched. The condition of paintings are deteriorating. Sittanavasal Cave Sittanavasal Cave (also, Arivar Koil) is a 2nd-century Jain complex of