Located at the southwestern tip of India, Thiruvananthapuram district is bounded by the Arabian Sea on the west and Tamil Nadu on the east. The wooded highlands on the Western Ghats in the eastern and northeastern borders give Thiruvananthapuram some of the most enchanting picnic spots. A long shoreline, with internationally renowned beaches, historic monuments, backwater stretches and a rich cultural heritage make this district a much sought after tourist destination.
Thiruvanathapuram is the State capital with an International Airport which makes it the Gateway Point to the God's Own Country - Kerala. Named after Anantha, the thousand-headed serpent of the Hindu Mythology, this is an ancient city with trading links that brought it into close contacts with the rest of the world. The seven hills over which the city is spread and the great variety of lovely old colonial and traditional Kerala buildings give Thiruvanathapuram a special ambience.
Physiography: Bounded on the east and north east by the mountain ranges of the Western Ghats, in the south by the fertile rice bowl district of Kanyakumari presently in the state of Tamil Nadu and on the west by the Arabian Sea, Thiruvanathapuram district has three major rivers, Neyyar, Karamana and Vamanapuram.
The Western Ghats which range along the eastern and north-eastern borders constitute the highland and it is covered by thick forests in its upper ranges while in the lower ranges forests are interspersed with plantations.
The lowland bordering the sea is densely covered with coconut palms. The soil in this region is sandy. Paddy is sufficiently grown here.
In the midland region are valleys, isolated hills and the plains leading to the forest-clad lands. This region is rich in agricultural products like paddy, tapioca (Yucca), spices and cashews.
The chief backwaters of the District are the Veli, and the Kadinamkulam, the Achutengu and the Edava Nadayara canals. At Varkala where there is a cliff formation, two tunnels of of 282 meters and 72 meters were constructed in 1877 and 1888 respectively. Besides these systems of backwaters and canals there is a fresh water lake at Vellayani.