Seems like your question is not complete. you must include from where to where.
Any if have plan for Delhi only then multiple places in daily itself will take your 2 days.
1. Akshardhm Mandir
2. India Gate (spcly in night)
3. Hauz Khas (spcly in Night)
4. Qutub Minar
5. Lal Kila
6. Kingdom of Dreams (in Gurgon)