The Idukki Arch Dam, also known as the Idukki Dam, is a double curvature arch dam located in the Indian state of Kerala. It is situated across the Periyar River in the Idukki district of Kerala. The dam is a significant hydroelectric power project and plays a crucial role in power generation, irrigation, and water supply for the region.

The dam was constructed between 1969 and 1975 as a joint venture between the Governments of Kerala and Tamil Nadu. It was built to fulfill the increasing power demands of the state and alleviate water scarcity issues.

The Idukki Dam and its surrounding scenic beauty attract tourists from around the world. There is a viewpoint near the dam that offers a panoramic view of the reservoir and the surrounding hills. Visitors can also explore nearby attractions like the Idukki Wildlife Sanctuary and hill stations like Munnar.