The "kudakkallu" is a kind of megalithic monument found in the state. The "kudakallus" are burial sites in which the corpse is buried and curvilinear blocks are installed on the ground with a hollow space in between. An umbrella-shaped block is kept atop.
In the case of "thoppikallu" (hood stone), the umbrella-shaped rock is placed on the ground.
The "kudakallu" and "thopikallu" monuments are found at Chowannur, Kandanassery, Porkulam, Eyyal, Kattakampal and Ariyannur in Thrissur district. The "kudakkallu" is mostly found in regions that fall under the erstwhile Kochi kingdom.