Originally used to transport up to 30 tonnes of rice and spices, the original function of the ketuvalloms is now performed by trucks. Large boats, generally over 60 feet in length, made of planks of jackwood tied together by coir ropes, the ketuvalloms or literally ‘boat with knots’ are coated with a caustic black resin derived from cashew kernels. Not even a single nail is used in the construction of these boats which, if maintained properly, can literally last for generations. Most of the kettuvalloms still in use are over a hundred years old.

Care was taken while converting the kettuvalloms to use only natural products. The wood of the araca nut tree and bamboo mats form the curved roof, parts of which open out to provide shade and an uninterrupted view. Wooden planks are used for flooring and the wood of coconut trees and coir for the beds. The only concession to modernity is the solar panels used for lighting. In spite of this, all the creature comforts and cleanliness of a good hotel are available on these houseboats so that they are literally floating luxury dwelling units.

Furnished bedrooms, modern toilets, a balcony for angling and delicious Kuttanad cuisine make travelling by kettuvalloms past cantilevered fishing nets in shallow, palm-fringed lakes along the green, untouched beauty of Kerala an experience to last a life-time.

While most boats are poled by local oarsmen, a few have been powered by a small outboard engine, which allows gentle cruising along the backwaters.