There are a lot of places. Parthsarthi Rocks in JNU. •Agrasen Ki boali •jamali kamali •The ridge.
There's a monument in the Sanjay Van called 'Sultan Ghari', it's a 13th Century monument, it is covered with forests all around giving excellent views in the evening time, when there's monsoon you'll feel that this place is not in Delhi.
With this population, I don't think so that's even possible
Agarsen bauli . You should definetly check out
Safdarjung tomb, bhuli bhatiari ka mahal, satpula
Unexplored Places in Delhi
1. Champa Gali, Saket Delhi
2. Sanjay Van
3. Agrasen ki Baoli
4. Mirza Ghalib ki Haveli
5. Asola Bhatti Wildlife Sanctuary