Chainpur Fort is a historic fort located in the Kaimur region of Bihar, near the border of Rohtas and Kaimur districts. The fort is believed to have been built during the medieval period and was later associated with Sher Shah Suri’s military network. Positioned on elevated terrain, it offered strategic control over surrounding routes and settlements. The remains of stone walls, bastions, and gateways reflect traditional hill-fort architecture. Dense forests and rocky landscapes surround the site, giving it a secluded and scenic character. Chainpur Fort played a role in regional administration and defense during its time. Today, the ruins stand as an important archaeological and historical landmark. The fort attracts history lovers and travelers interested in lesser-known heritage sites.