Energised Pilgrimage

My family visited Tirumala last weekend.
We went up the hill on foot. It's a looong trip up the hill about 9 to 10kms. On the way there are many picturesque viewpoints. But something different I have seen was alternate energy methods. The first I saw was this:

this pic was flicked from flickr :)

After I reached tirumala another interesting site I saw was the usage of solar cells.

this was googled up