We are at Kollengode, a small hamlet in central Kerala, far from the beaches, wildlife sanctuaries and hill stations thronged by international tourists in God&rsquos Own Country. This is where, according to a charmingly written local history, &ldquothe map-line melts like butter, and the edges of Tamil crinkle into Malayalam.&rdquo Located in a gap in the Western Ghats (the famous Palakkad Gap of geography textbooks), close to the border with Tamil Nadu, is one of Kerala&rsquos loveliest palaces. Built in the late nineteenth century by the Rani of Vengunad, the palace has been reborn as Kalari Kovilakom, an Ayurvedic treatment centre that claims to practice Ayurveda in its purest form, as a serious medical science, shorn of trappings like scented candles and trance muzak.