Kettuvallam is a houseboat widely used in the Indianstate of Kerala. These have thatched roof covers over wooden hulls.[1] The traditional kettuvallam is mainly used for promoting Kerala tourism.[2][failed verification]
^Ayub, Akber (ed), Kerala: Maps & More, Backwaters, 2006 edition 2007 reprint, p. 47, Stark World Publishing, Bangalore, ISBN81-902505-2-3