The semi-underground Kyiv Fortress Museum or Kyivska Fortetsya is a 19th century defense building which was at one-stage part of the western Russian fortresses. These buildings were common sights in Kiev in the past and were placed in most neighborhoods by the Russian army. The multitude of defense structures built in the capital make it the largest city fortress found anywhere in the world. You can find this restored Kyiv fortress situated on a hill in the center of Kiev.