Rosenstein Tunnel

Rosenstein Castle with the first rail tunnel in 1846
Northern entrance to the old Rosenstein tunnel, April 2011

The Rosenstein tunnel (German: Rosensteintunnel) is the name of several past, present and planned tunnels in the Stuttgart metropolitan area, in the German state of Baden-Württemberg. Today it is a railway tunnel under Rosenstein Park to Bad Cannstatt. It now connects the Fils Valley Railway (Filstalbahn) from Stuttgart Central Station (Hauptbahnhof) to the Rosenstein Bridge over the Neckar to Bad Cannstatt station.