25th Dec (Christmas day), I had been to temple near bettadasana pura. It's in a small village connecting the Bannergatta road with Electronic city (the road is named wipro road, I think). The temple atop a small hill has both Venkateshwara (Vishnu) and shiva temple. It's covered all around with a Fort wall though broken at many places. It was so different not only in architecture but just the fact that it was such an old one (more older than kempegouda defining the Bangalore boundary). The priests were different from the normal showoff temple priests in most part of Bangalore. They were eager to hear about each people visiting the temple. Talk to them, provide a brief info about the temple, and do archana free of charge and that too patient to hear about all the names in the family :-)
So different from all the artificial temple 5-star pieces like ISKCON (5 Star complex/Multiplex?), Shiva temple in airport road, dodda ganesha temple in Bull temple road(temple is great, only the priests can change :)) etc in Bangalore.
About the temples I recommend: Visit Gavi Gangadeshwara temple in Kempegouda nagar (few kms from chamrajpet).. a cave temple that really mesmerizes you. .. If you also have some recommendations for old temples where you can feel the spirit of it as a temple, do post details in your comments!