As a youngster growing up in Highland Park, Michigan I was always baffled by the barren, dilapidated concrete structures which sat at the corner of my elementary school. The mystery was heightened when I was I child, because the structures remained covered by metal shutters for obvious security issues. The metal shutters used to cover the stairs were frequently used as an impromptu instrument as students stood atop and stomped repeatedly to make as much noise as possible during the walk to school or at the end of classes. The reverberating noise created by the metal panels over a voided structure was soul satisfying for some odd reason. I can also remember those loud thunderous noises being the soundtrack to various childhood fights I witnessed. Standing atop these structures were the best seat at the intersecting corners where skirmishes would frequently occur.  It was not clear to us as children that these concrete structures were actually stairs which lead children to underground passages.