Thellar is a block located in the eastern region of
Thiruvannamalai District. This administrative unit is about 12 km south of
Vandavasi, on the road to
Tindivanam. King Nanthivarma College of Arts and Science and Swamy Abedhanandha Polytechnic College are the landmarks.
In the neighborhood lie Adi Parasakthi Temple at Melmaruvathur, Ponnurmalia Teerth, Thennangur, Thoosi Mamandoor, Venkataramana Temple, Gingee Fort and Sri Mangalambigai Temple at Melsevur.
Tindivanam Railway Station and Olakur Railway Station are about 18 km away. Desur (11 km west), Malaiyur, Marutadu, Olakkur and Vallam can be reached from Thellar. Nearest airport is Chennai International Airport, which is 91 km north.
