Watertown Arsenal

Watertown Arsenal is a historic military complex in Watertown along the Charles River featuring brick buildings with slate roofs arranged in systematic north-south alignment. The site spreads over about 40 acres and displays the organized industrial architecture typical of 19th-century military facilities.

Founded in 1816, the facility replaced Charlestown Arsenal and became the main site for military weapons production. It remained active in ammunition and arms manufacturing until closure in 1968.

The site shaped how locals viewed their town as an industrial powerhouse dedicated to military production and innovation. Visitors today can observe how the buildings and layout tell the story of this manufacturing identity.

The site is now open as a mixed-use area with offices, restaurants, and arts facilities along the riverfront. Visitors can walk through the grounds and enjoy waterfront access directly from the Charles River.

Building 311 was constructed during World War I expansion and was one of the largest steel-frame structures built in the nation at that time. This engineering achievement shows the industrial capability of the era.

Location: Boston

GPS coordinates: 42.36220,-71.16600

Latest update: December 8, 2025 13:42