This wonderful temple city complex. esp. after the recent cleanup by the provincial Government of Odisha ; unfolds in an array of majestic structures that one can go back 1200 years to visualize how life was back then ! 

Very Ornate group of temples, ponds , cultural stages, etc

Its an inexcusable miss either by UNESCO to not have it listed , or  a case not well presented by the government to the World body! 

It's older (800 AD)  than the nearby Shri Jagannath temple in Puri, (about 1000 AD) which itself older than UNESCO listed Konark Sun temple (1200 AD).