It is the oldest archaeological site. Located at a distance of 18 km north of Bogra town, Mahasthanragh is the oldest archaeological site of Bangladesh on the western bank of river Karatoa.
The spectacular site is an imposing landmark in the area having a fortified long enclosure. Beyond the fortified area, other ancient ruins fan out within a semi circle of about 8 km. radius. Several isolated mounds, the local names of which are Govinda Bhita Temple, Khodai Pathar Mound, Mankalir Kunda, Parsuramer Bedi, Jiyat Kunda etc. surround the fortified city. This 3rd century B. C., archaeological site is still held to be of great sanctity by the Hindus. Every year (mid-April) and once in every 12 years (December) thousands of Hindu devotees join the bathing ceremony on the bank of river Karatoa. A visit to the Mahasthangarh site museum will open up for one a wide variety of antiquities, ranging from terracotta objects to gold ornaments and coins recovered from the site. Also noteworthy are the shrine of Shah Sultan Bulkhi Mahisawary and Gokul Medh in the neighbourhood of Mahasthangarh.