The best specimens of the architecture of the Salasthambha period are the remains of the five rock-cut caves at Jogighopa on the bank of the Brahmaputra in the district of Bongaigaon. These are the unique examples of rock-cut architecture in Assam. Though these rock-cut caves are not of such architectural interest as those in Western India, but these remains at Jogighopa are the clear evidence of the fact that Assam was not outside the movement of this particular type of art developed in India as it will be seen from description of the best preserved cave noticed at Jogighopa.Cave measures 2.60 m breadth ,1.8 metre in depth and 1.90 meter in height and also a roughly rounded ceiling and in front a verandah 75 cm long by 35 cm broad. A platform of brick and mud masonry is found inside which is obviously a later addition. A chase running across the entire breath of the cave on the top serves to drain away rain water from the facade. Flights of steps have been cut into the rock on either side and ledge on the top diverts the rain water from the facade. The cave bears no sculptural designs. The other caves at the site have no flights and verandah and smaller in size than the best preserved one.