Battery Chamberlin Trail

Ranger leads a demonstration at Battery Chamberlin

Dan Friedman/National Park Service

The army built Battery Chamberlin on Baker Beach in 1904 to protect the harbor’s minefields. In 1977, the Golden Gate National Parks acquired a 97,000-pound cannon of the type originally emplaced here, and visitors today can still see this “disappearing” gun that can be cranked in and out of its hidden emplacement.