Walking the area of Grodzisko Fort, you'll pass brick bunkers covered by earthen embankments, connected via underground tunnels which stretch across the whole area, linking buildings with each other.
One of the few military facilities in the middle of the Old Town in #Gdansk - its interior recently renovated and transformed into an interesting cultural spot, music club and gallery "Bunkier".
Right beside the Lowland Gate are bastions Bison and St Gertrude's, 2 of 14 protecting the circumfluence of Motława. Not only soil was used in their construction but also rubbish from the city #Gdansk
