Sisupalgarh is one of the most important archaeological sites around Bhubaneswar, though it receives far less attention than the city's famous temples. The remains mark an ancient fortified settlement, with traces of defensive earthworks, gateways, and laterite pillars that hint at a sizeable urban centre long before modern Bhubaneswar existed.
The site is not heavily interpreted, so it rewards travellers who enjoy piecing together landscapes rather than being led through a museum-style route. Go with realistic expectations: this is archaeology in the open, partly absorbed by the expanding city around it. The value is in standing on the ground plan of an early urban settlement and seeing how deep Odisha's history runs.