Fitchburg is situated on both the Nashua River and a railroad line. The original Fitchburg Railroad ran through the Hoosac Tunnel, linking Boston and Albany, New York. The tunnel was built using the Burleigh Rock Drill, designed and built in Fitchburg. Fitchburg was a 19th-century industrial center. Originally operated by water power, large mills produced machines, tools, clothing, paper, and firearms. The city is noted for its architecture, particularly in the Victorian style, built at the height of its mill town prosperity. A few examples of these 19th century buildings are the Fay Club, the old North Worcester County Courthouse and the Bullock house.