Manalaru dam, popularly called High Wavy Mountains, is a cool and misty mountain range situated in the Western Ghats in Theni district, Tamilnadu, South India. It is a place of natural beauty dotted with cardamom plantations and tea estates.

The place is situated at an elevation of 1,500 m above sea level and it is rich in flora and fauna. This area, now mostly planted with tea, includes Cloudlands, Highwavys and Manalaar estates, the access to which is now largely restricted. It still includes large untouched remnants of evergreen forest.