WWII bombs...
Thousands of homes have been built over a 12,000-acre area that was once a World War II bombing range in Orlando, Florida. The first bomb was discovered in 1998 near the running track of a local middle school. Since then, over a hundred rockets and bombs have been found on the school property and in backyards of nearby housing developments. Even though the Army Corps of Engineering have launched a large-scale cleanup of the area, the danger of stumbling across a bomb left behind is still pretty high.