City in Kerala. Southern India. The capital of Kerala. The city name is translated from Malayalam as "St. Anant's Residence". Thiruvananthapuram is located on the coast of the Arabian Sea, near the extreme southern point of the Hindustan Peninsula. The city covers an area of 215 km², the average altitude of Thiruvananthapuram: 4.9 m. The Karaman and Killy rivers flow through the city.