Golconda fort , chow mahalla palace, hussain sagar lake, birla temple(provides a great view of the city), ramoji film city, falaknuma palace. if you have time, buy some authentic Hyderabadi pearls and do have the Hyderabadi biriyani.
Hey bro,there are a plenty of places in hyderbad...like golconda fort,ramoji film city,snow world,charminar,birla mandir,maula ali darga,zoological park,hussain sagar lake,NTR garden,palace hotel famous for biriyani etc..its a never ending list