Travelers are voting Dolmen Circle as the best ruin in Theni. There are 1 ruin in Idukki a city just 36 km from Theni and 1 ruin in Coimbatore which is 77 km distant. The most popular of these are Marayoor Dolmens in Idukki and Droog Fort in Coimbatore. You can find 8 ruins in Tamil Nadu and 95 ruins in the country of India. Our members favorite in Tamil Nadu is Tangrakottai and Mahim Fort is the top pick in India. Want more? Check out our map of ruins in Theni.