Chilika Lake
Chilika lake is the largest salt water lagoon in Asia and the largest salt water lake in India. More information is available on Wikipedia. Barkul is around 70 km from the conference venue. From there, one can take a boat to explore the lake. 1.5 hr one way journey time.
By Government of Odisha - From Twitter account of Naveen Patnaik, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=125479979
Mangaljodi
Mangalajodi is a special attraction for bird watchers at the Chilika lake that harbour thousands of water birds, both migratory and resident. Mangalajodi is about 110 kms from the conference venue. 2.2 hr one way journey time. More details may be found here.
Source: https://www.chilika.com/mangalajodi.php
Konark Sun temple, Konark
The temple was built around 800 years ago by the Eastern Ganga dynasty. Around 200 km away from the conference venue. More details available on wikipedia. 4 hr one way journey time.
By Subham9423 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=97239992
The caves of Khandagiri and Udayagiri, Bhubaneswar
By Sailesh Patnaik - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=50313308
By Bernard Gagnon - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=35511221
Mukteshwara temple, Bhubaneswar