Flowing through the city of Thiruvananthpuram in Kerala, Karamana River starts near the southern tip of the Western Ghats at Agastyar Koodam and joins with the Arabian Sea at Panathura near Kovalam. Killiyar which flows for a distance of 24 kms, is the largest tributary of Karamana. The river has two important damns namely Aruvikkara Dam and Peppara Dam. Peppara Dam adjusts the water flow in Aruvikkara Dam. Karamana River holds up rich biodiversity which consists of- wild cane, bamboo, mangroves, water lillies and coconut trees; one can spot rare species of pine or pandanus along the river bank and some rare fish species such as karimeen, chekkaali, kariyida, paruminali, cherumeen, vaala, nedumeen and paaval.
Apart from the largest bridge Karamana itself, there are numerous bridges on the crossways of Karamana River. Some of the bridges are- Thrikkunnapuram, Mangattu Kadavu, Kundamon Kadavu, Vellaikadavu, Aruvikkara and Maruthoor Kadavu.
Moreover there were many famous musicians who got influenced with the astonishing beauty of the river; some of them were Irayimman Hampi, Vadivelu, Neelkanta Sivan and K S Chitra. Also, the well-known composer-king Swathi Thirunal was also swayed away by the beauty of River Karamana.