Take a spooky lantern-light ghost tour led by costumed Civil War veterans. Infamous as one of the most haunted buildings in DC, find out why ghosts call the National Building Museum their home. Hear tales of an irritable rider on horseback and look for mysterious faces in the 75-foot Corinthian columns and much more! 2013 Dates: September 29, October 23, 20, and 31. Registration is required. Call (202) 272-2448.