MADISON, GEORGIA : MAGNOLIA HOUSE Published on June 23, 2013September 7, 2020 by jacquelinemhadel Supposedly, a tunnel was discovered linking this house to the Presbyterian Church, so it has been speculated that it may have been part of the Underground Railroad. 22JUN13. Madison, GA. Share this:TwitterRedditFacebookTumblrPinterestEmailMorePrintPocketLike this:Like Loading...