Udayagiri and Khandagiri caves are ancient rock-cut caves located in the city of Bhubaneswar. These caves are considered to be one of the most important historical and archaeological sites in the region, and are a must-see for tourists visiting Bhubaneswar.

Udayagiri, which means "hill of sunrise," is a complex of 18 caves that were carved out of a single hill. The caves date back to the 1st century BC and were used as residential quarters by Jain monks. The most notable cave in Udayagiri is the Rani Gumpha, or the "Queen's Cave," which is the largest and most ornate of all the caves. It features intricate carvings and sculptures, including a depiction of the Jain tirthankara, Rishabhanatha.

Khandagiri, which means "broken hill," is a group of 15 caves that were also carved out of a single hill. These caves are believed to have been used by Jain monks and were also used as a place of meditation and worship. One of the most famous caves in Khandagiri is the Ananta Cave, which features a large carving of a serpent and intricate carvings of Jain tirthankaras.

Both Udayagiri and Khandagiri are known for their beautiful carvings and sculptures, which provide a glimpse into the rich cultural heritage of ancient India. Visitors can also enjoy the scenic views from the top of the hills and take a stroll through the lush gardens surrounding the caves.

The caves are open to visitors every day except for certain public holidays, and guided tours are available for those who wish to learn more about the history and significance of the caves. It is recommended to visit in the morning hours as the sunlight enhances the beauty of the carvings and sculptures. With the rich cultural and historical significance, it's a perfect place for the history buffs and archaeology enthusiasts.