Vandalur Reserve Forest is a protected area located in the suburb of Vandalur in the southwestern part of Chennai, about 30 km from the city centre. It is bordered by the Grand Southern Trunk (GST) Road in the west and Suddhanandha Bharathi Street on the northern and the eastern sides, and is intersected by the Vandalur–Kelambakkam Road on the southern side. The reserve forest contains Arignar Anna Zoological Park, the largest zoological garden in the Indian Subcontinent.