Interlocking tower at Shawano, Wis. By Mitch Horner | December 4, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates A brick interlocking tower guards the crossing of Soo Line (left to right in photo) and Chicago & North Western trackage in Shawano, Wis. Gordon Odegard photo Share this article Print Facebook