Bhoothathankettu is a dam and tourist spot in Kerala, India. It is situated outside the village of Pindimana, about 10 km away from the town of Kothamangalam and 50 km away from the main city of Kochi. The original natural dam has been supplemented by a modern dam impounding the Bhoothathankettu Reservoir (Thattekad Reservoir). During the Malayatoor pilgrim season, travelers use the roads through the forest.
Large blocks of unshaped stones are placed on both sides of the Periyar River to form the dam, making it look like a natural dam built by superhumans. The name Bhoothathan Kettu, means "monster fort"; past generations believed it was built by a Bhootham (monster).