Bhubaneswar, Puri and Konark form a golden triangle. These cities have numerous historical and religious monuments. There are many scenic places also nearby. You may wish to check out the following links for further details.
Bhubaneswar, Puri and Konark : Click Here
Bhubaneswar : Site1, Site2 and Site3
Puri : Click Here
Konark : Click Here
For tourism purpose, you may also like to consult Orissa Tourism, India Tourism, Incredible India