Bhubaneswar's Regional Museum of Natural History is a useful science stop in a city better known for temples. Exhibits focus on biodiversity, ecology, geology, and conservation, with particular relevance to eastern India and Odisha's forests, wetlands, and coast. It is a good place to put the region's wildlife and landscapes into context before heading farther afield.
The museum works best for families, students, and travelers who want a break from temple architecture without leaving the city. It is not as essential as Lingaraj or the great temple circuit, but it adds balance to a Bhubaneswar itinerary. Allow an hour or two and check current opening times.