Quick Info Location: Pachamalai Hills, Google Maps   Pachamalai Hills Famous For: Waterfalls, Trekking trails and Medicinal gardens   Ideal Duration: 1 - 3 days   Closest airport and railway station: Tiruchirappalli International Airport and Trichy Junction   PACHAIMALAI HILLS: Pachai means 'green' and Malai means 'Hill', as the name suggests. It is located in northeastern Tamilnadu uplands and is an extension of the Eastern Ghats. The Pachamalai Hills have rivers known as Sweata Nadi and Kallar flowing through the Pachaimalai Hills are a mountain range in Tamil Nadu, India.