Inside the Peter & Paul Fortress, a separate ticket gives you access to both a walkway that goes along the walls and leads to the Naryshkin Bastion. The same ticket also gets you into the Postern, a 97.4m passage hidden in the fortress walls.
©Kira Tverskaya/ÀÏ°ÄÃÅÁùºÏ²Ê¿ª½±¼Ç¼