1) Stone bridge 
Silsako was ancient stone bridge over channel of river Barnadi in Hajo, Kamrup. Though channnel changed its cross over the time, yet Bridge is stranded in middle of a small lake. It is important transit route in ancient and medieval times. Many invaders like Muhammed Bin Bukhtiyar entered into Kamarupa in the year 1205-06 AD, and crossed the bridg...