Tunga Bridge, Sri Rameshwara Temple, Ambuthirtha, Kuppalli, Agumbe, Chibbalagudde, Anandagiri and Siddeshwara Gudda, Kundadri, Kaveledurga, Araga, Onake Abbey Falls etc..
Thirthahalli is a taluk head quarters, amidst dense forest and is about 65 Kms from Shimoga. Thirthahalli taluk is located in Shimoga district of Karnataka on the banks of river Tunga. It was called 'snow less Kashmir' in the olden days by travelers and visitors. Tirthahalli is one of the various holy sites in India. Its name is derived from the numerous theerthas (holy water) of Tunga river. Rameshwara Temple is located on the bank of river Tunga and attracts tourist and pilgrims for holy bath during the January.
According to a Hindu legend, the sage Parashurama using an axe, chopped off his mother Renuka's head on the orders of his father, the great sage Jamadagni. Later, Parashurama tried to wash the blood stains off the axe by dipping it in various rivers. Despite his best efforts, a sesame-sized blood stain remained on his axe. It was washed away only when he dipped his axe in the Tunga river near Thirthahalli.
This place is now called as Parashurama Thirtha (or RamaThirtha) and is the origin of the name Thirthahalli (halli means village in the native Kannada language). Near RamaThirtha, there is a stone mantapa called Rama Mantapa. This legend has made Thirthahalli a holy place for Hindus with a belief that a dip in the river Tunga here will cure one of all sins.
Another legend related to the times of Ramayana, indicates that Maricha, a relative of the Lanka king Ravana came in the disguise of a golden deer to enchant Sita, the wife of Rama. When Sita requested Rama to get her the deer, Rama followed the deer and killed it. This incident is supposed to have happened near a place called Mrugavadhe in Thirthahalli Taluk. Mrugavadhe means Killing of an animal in the local sanskrit language
Thirthahalli has a rich archaelogical history with Neolithic sites uncovered in Kunda Hill near Agumbe and portholed burial chambers found at Arehalli near Thirthahalli.
A small fort was constructed at Kavaledurga, near Thirthahalli at around 9th century AD. The king of Belagutti, Cheluvarangappa strengthened this fort in the 14th century. Venkatappa Nayaka, a Keladi king, acquired this fort and constructed seven battlements to protect this fort in the 16th century. Hyder Ali conquered this fort in the 18th century and later the fort came under the rule of Tippu Sultan.