If you're interested in local religious buildings head to Patel Nagar— home to Hashtsal Minar. You could also start your cultural experience by heading over to the art galleries in the area. It's also full of great shops and restaurants, so you can spend the afternoon having a wander.
Dwarka is home to Iskcon Temple, so why not stop by during your stay in New Delhi. It's also full of great shops and restaurants, so you can spend the afternoon having a wander.
If you're planning a bit of sightseeing head to Shri Shiv Shakti Hanuman Mandir— just one of the monuments in Narela. It's also full of great shops and restaurants, so you can spend the afternoon having a wander.
If you want to give your credit card some exercise, head out to Janakpuri District Centre in Janakpuri. It's also full of great shops and restaurants, so you can spend the afternoon having a wander.