The Kreuztor is the most recognisable landmark in Ingolstadt — a 14th-century fortified gate tower in dark red brick that punctuates the southern edge of the old town. It stands nearly 30 metres high, with four corner turrets and an octagonal main tower, and looks very much like what it is: a serious piece of medieval military architecture built to stop people getting in.
The gate is one of only a handful of surviving structures from the original city walls, most of which were demolished in the 19th century when they became obstacles to urban growth. The Kreuztor survived partly by luck and partly because it was useful for storage. Today it stands as a free-standing monument at the edge of a small park, with the pedestrianised old town stretching north from it. The interior is not generally open to visitors, but the exterior is worth photographing from multiple angles.