Trikotadrai

There are three different ways to climb up the hill. One of the most fascinating aspect of the hill is that from all angles one could see only three peaks and, therefore, it is called "Trikoota Hills" and the God seated therein is famous as Trikoteswara Swamy.

These three peaks are known as Brahma, Vishnu and Rudra. Anent to the legend, Lord Siva after destroying "Daksha Yagnam" pacified and converted himself into a 12 years old boy and with a great deal of austerity commenced penance as Dakshana Murthy in Kailasam. 

Then, Lord Brahma and other Gods appraoched and offered prayers to Dakshana Murthy and entreated him to impart the knowledge of "Brahma". Dakshana Murthy accordingly agreed and asked them to come to Trikoota hills where he imparted them the knowledge of "Brahma" making these hills very sacred.

Gods on the three peaks are known by different names 

1. Brahma Sikaramu (Trikoteswarudu) 
2. Rudra Sikaramu(Papa Koteswarudu) 
3. Vishnu Sikaramu (PapaVishnu Saneswarudu).

http://www.kotappakonda.com/

Dampadya Dakshinamurthy / Link

http://www.hindu.com/thehindu/fr/2003/02/28/stories/2003022801290600.htm

Apart from here he is seen with his consort as ‘Sakthi Dakshinamoorthy’ in Thirukallil.

Unique Prasadam

Here Viboothi (holy ash) is not given as prasadam like the other Shiva temples, instead holy water is given as prasadam and blessing is done with Chadari like a Vaishnavite temple.

The route is Chennai -> Redhills -> Periyapalayam -> Uthookottai -> Surutapalli. The route is Tirupathi -> Puoor -> Nahalapuram -> Surutapalli.