The Gate can be visited
Town Fortification Rostock-Kuh Gate

The Kuhtor in Rostock is the oldest preserved city gate in Northern Germany and part of Rostock's city fortifications.
History+
The early Gothic gate tower was first documented in 1262. Originally, it led to the roads to Bützow and Werle. Soon after, its importance as the main southern exit gate was superseded by the Steintor. From then on, it primarily served for driving cattle to the Warnow meadows, which gave it its current name. By the end of the 14th century, the field side was walled up. It was only temporarily reopened during the conflicts between the city and the regional lords, which led to the First Rostock Inheritance Treaty. From 1608, the city council used the gate as a light prison, a civic custody, with both sides being closed. Later, from 1671, it was converted for residential purposes, including for the city's gunsmith.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Rainer Gindele
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 54.0867, 12.1436