Bhoothathankettu
The 928th tallest dam in the world
Bhoothathankettu is a dam and tourist spot in Ernakulam district in Kerala. 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). Large blocks of unshaped stones are placed on both sides of the Periyar River to form the dam. The name Bhoothathan Kettu, means "monster fort"; past generations believed it was built by a Bhootham (monster).
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).