Alumkadavu is where the first houseboats in India were built. Located north of Kollam district, the waft of coir and wood is always in the air of this village. And the reason: It is a major centre for the construction of kettuvalloms (traditional rice barges) which are later modified into houseboats for travellers. The houseboats eventually take shape at the hands of skilled craftsmen of the village, who make sue of local and eco-friendly materials like wood, bamboo poles and coconut fibre. Alumkadavu is also a coir manufacturing centre, making Kollam famous for its coir products.