Talk:Secret passage/to do

Detail different types of secret passage:
 * Inside a building:
 * a secret corridor from one room to another
 * a secret area of the house including a hidden room
 * Leading into and out of a building

Detail famous passages:
 * Find buildings with articles
 * Some houses on the Underground Railroad had hidden passages/rooms/closets in which escaping slaves could hide. Those should be relatively easy references to find.