secret passages
...that secret passages have helped people to hide in or flee from a building, or even to enter it without being spotted?
...that <b id="mwBvE"><a href="./Secret_passage" id="mwBvI" rel="mw:WikiLink" title="Secret passage">secret passages</a></b> have helped people to hide in or flee from a <a href="./Building" id="mwBvM" rel="mw:WikiLink" title="Building">building</a>, or even to enter it without being spotted?