A Shiva temple in the Valappur Nadu situated on the stream Aiyaru. Its is dedicated to Arppalli Iswarar. The deity's other names are Thiru Arappalli Ashavar, Thiru Arappalli Mahadhevan and Thiru Arappalli Udaiyar, The Deity's consort is Archalai. It is a 12th century temple. Valli Amman, also known as Sucmathamba, and Thayammai. Because of the belief that Arappalli Iswarar resides in the small fish of Aiyaru, the temple has also the name of Fish temple. It is customary for the pilgrims to catch the sacred fish by hand, adorn them with gold or silver nose rings in fulfillment of vows. The Hindu legends of the temple’s origin claim that the lingam in the main shrine was unearthed during the ploughing of a field. The scar on its top is supposed to have been caused by the plough.

Akasa Gangai is an enchanting 300 feet waterfall of river Aiyaru, located near Arappaleeshwarar temple. Thousands of steps lead down to the falls. It is situated in a beautiful valley surrounded by the mountains at all sides. En-route, the natural beauty of the valley and the vegetation-covered peaks. The location is ideal for trekking and the breeze is pleasant, the cascade of silvery water touching and brushing the innumerable herbs which are abound in Kollihills keeps everyone spell bound and fresh with its herbal qualities.

Masila falls is a cascading falls of 200 feet among nature and Masi Periyasamy temple is on top of Masila falls.