The name Hosur in ‘Kanarese’ means ‘new town’. A large fort situated in this town is ascribed to one ‘captain Hamilton and two other prisoners who were compelled by Tippu Sultan to assist in strengthening his foils. The fort has long out ramparts with a moat deep and wide and a glacis carefully leveled. Within the fort precincts, there is a temple called Kottai Mariamman temple’, dedicated to Shakti, is popular among the people of Hosur. Lord Chandrasuryeswarar temple ‘atop a hill is popular and the annual festival is attended by thousands of pilgrims from Karnataka.
Krishnagiri dam is situated at a distance of 7 Km from Krishnagiri. It is in between Dharmapuri and Krishnagiri. Thousands of acres of land around Krishnagiri are irrigated with the help of this dam. This is a famous tourist spot too.
Rajaji Memorial Thorapalli is in memory of the great leader Rajaji. The Tamil Nadu Government has converted the house in Thorapalli where Rajaji was born, as a memorial. It is located 10Km from Hosur near Onnalvadi. It was opened on 10-12-1979. Some of his belongings and a photo gallery depicting his various facets of life are displayed here.
Rayakottah, a hill fort, situated at a distance of 30 Km from Hosur marks the border of the Palghat plateau. Even after the Mysore wars, for the British it was a strategic place where their troops were stationed till 1861. The ramparts and the bastions of the fort are more or less intact.
This is 25 Km from Hosur situated near the Karnataka state. The area is coveted by a number of hills. The climate is chill round the year. Ii is called Little England. The taluk headquarters is Denkanikottai. The fort at Denkanikottai is built by Palayakarar in 1530 AD. The fort was destroyed during war with Hyder Ali and Tippu Sultan. There is a temple for Venugopala Swami. Car festival is held during the month of May every year.