Reduit Tilly is the core building of Ingolstadt's classical Brückenkopf fortress, standing south of the old town on the Danube. It now forms part of the Bavarian Army Museum, with exhibitions focused on the First World War.
The surrounding Klenzepark softens the military architecture with lawns, paths, and river views, making this a good stop for both the fortress history and a quieter walk just outside the centre.