delhi metro

I have created this thread which shows a map of the Delhi Metro line for the help of people travelling in Delhi. I hope this will help people on the forum and travelers in Delhi.

I am going to be in Delhi for a while and would like to visit some of the places, I don't want to hire a taxi as it would work out to be too expensive, would it be wise traveling on the Delhi metro to visit the tourist places? If I travel on Delhi metro would it take longer than traveling in a...