I like to roam in Lutyens Delhi, it's scenic, it's calm and it's safe too.
Dhaula Kuan> Chanakya puri > India Gate > Bangla Sahib > Connaught place > New Delhi Railway Station > ITO > Barapulah > AIIMS > Munirka > NH 48 > Aerocity > Jankpuri. Quite a long trip, isn't it?