Olympia Fields Park District will offer a bus tour on Thursday, Sept. 19, providing an opportunity to learn about the local history of the Underground Railroad.The tour will begin at 9:30 a.m. The registration deadline is Sept. 10. The cost is $80 per person, which includes lunch and transportation. To register, call 708-481-7313, extension 221.The tour will include visits to two designated sites on the National Park Service's "Network to Freedom," significant locations that have a verifiable connection to the Underground Railroad. The program starts in Crete and ends at the . . .