Kanchipuram
The 8th-century Kailasanathar Temple is the oldest and most artistically significant temple in Kanchipuram — a masterpiece of Pallava architecture dedicated to Lord Shiva, built by the Pallava king Rajasimha. The sandstone temple is remarkably intimate compared to later Dravidian colossi, with exquisitely carved panels of Shiva in various manifestations, a circumambulation tunnel that you must crouch to pass through, and an atmosphere of profound antiquity.
The circumambulation tunnel around the inner sanctum is a ritual passage — you must crawl through it for a complete circuit. Carry a torch to navigate the sections that are not lit.