many of the fortifications date back even farther, to the late 19th century Triangle of Fire - The Harbor Defenses of Puget Sound (1897-1953): https://www.hist

many of the fortifications date back even farther, to the late 19th century Triangle of Fire - The Harbor Defenses of Puget Sound (1897-1953): https://www.historylink.org/file/7524 https://www.historylink.org/file/7524 Fort Worden State Park in Port Townsend is the one I'd recommend visiting if you could only see one.