Buddha Garden. Ive been visiting this part quite often since my childhood. This is a huge park. Its full of greenery. For people of Delhi, this creates an amazing environment full of fresh air and greenery. Its an escape from Delhis fast life, hustle and bustle, and especially from pollution. It also has a small lake spot with ducks. Its located in central Delhi. Its very very accessible as it is in centre of Delhi and roads around it is very well made and are wide open.
Since childhood, I used to go there with my parents for morning walks. Sometimes, you will also see people enjoying a picnic. Its a good picnic spot. very calm. You can also find lots of hotels within 3 to 4 Km range.
I will recommend this park.