Perunchani Dam

One of Asia's tallest and longest trough bridges, carrying an irrigation canal across a valley on tall stone piers; built in 1966.

A rock-cut cave temple dedicated to Shiva as Nandeeswarar, dated to around the 8th-9th century and regarded as a showcase of Pallava-era cave architecture. Its interior frescoes and murals are considered early examples of the Kerala mural style, and the cave carries old inscriptions. It is one of the few surviving rock-cut cave shrines in the far south of Tamil Nadu.

A Murugan temple standing atop the roughly 200-foot Vellimalai hill, reached by about 106 stone steps leading to a shrine that occupies an acre at the summit. The hill sits between the Western Ghats to the north and the ocean to the south. It offers wide views over the far south of the peninsula.

One of the 108 Divya Desams of Vaishnavism, dedicated to Adikesava Perumal (Vishnu), set amid three rivers and known for its reclining deity image.

Reservoir and dam across the Kodayar river built 1897-1906, a scenic Western Ghats picnic spot with a garden and boating facility.

A pair of dams, Chittar I and Chittar II, built across the Chittar tributaries of the Kodayar river system in the Western Ghats foothills. Together with Pechiparai and Perunchani, they form the district's main irrigation reservoir network. They are visited for their forested, hilly surroundings.

Popular man-made cascade on the Kodayar river, about 50 feet high, a well-known picnic and swimming spot with a small Shiva temple nearby.

Former capital and wooden palace complex of the Kingdom of Travancore, one of the largest surviving wooden palaces in Asia, noted for its carved teak ceilings.

A prominent Roman Catholic church in the Diocese of Kottar, raised to the status of a minor basilica. It is a major centre of the strong Catholic community of interior Kanyakumari district. The basilica is a well-known pilgrimage and festival church in the Marthandam-Kuzhithurai belt.

Rock-cut Jain temple (locally Bhagavathy Amman koil) carved into a hillock, dating to the 9th century, with sculpted Tirthankara images and a rock-cut stepped approach.

The dargah of Peer Mohammed Appa, a 17th-18th-century Sufi philosopher and Tamil poet who settled at Thuckalay and kept close ties with the Travancore rulers. It is one of the most renowned Sufi pilgrim centres in Kanyakumari district. His annual Urs in the Islamic month of Rajab is a local holiday drawing devotees of all faiths from Tamil Nadu and Kerala.

This 17th-century fort was rebuilt between 1741 and 1744 by Maharaja Marthanda Varma under the Flemish commander Eustachius De Lannoy, and served as Travancore's chief military barracks and gun-casting foundry. De Lannoy, his wife and son are buried in a ruined chapel inside the fort, marked by a bilingual Tamil-Latin tombstone. The 90-acre granite-hillock site is now managed as a biodiversity park by the Tamil Nadu Forest Department.