COUNTYThe Butler Ghost Walk will take place at 7:30 p.m. Oct. 23, 24, 30 and 31 beginning in Diamond Park. The event takes spectators on a 60-minute guided walking tour. Participants will hear about the ghosts from Butler’s historic past through tour guide Bill May’s stories of Sam Mohawk, Ghosts of the Old Hospital, The Haunted Elevator, The Chinese Laundry Murder, and the Phantom Civil War Regiment, among others. Reservations are required and can be made by calling 724-256-9026 or sending e-mail to butlerghostwalk@gmail.com. Cost is $10 per person. Children under 18 must be accompanied by an adult.Butler County Historical Society’s Senator Walter Lowrie House Museum isclosed for October to set up a Civil War in Pennsylvania exhibit. Call 724-283-8116 or visit www.butlerhistory.com.The Old Stone House will host its “Spooky Stories” Halloween festivities from 5:30 to 8:30 p.m. Oct. 22 and 23. There will be storytelling by Joanna Demarest, Alan Irvine, and Marsha Wong, historical re-enactments and family activities. The program Oct. 23 will include the annual costume contest for children 10 and younger. Admission is $5 for adults and $3 for children, but no more than $15 for a family. The Old Stone House at the intersection of Routes 8, 173 and 528 is owned and managed by Slippery Rock University. Call 724-738-2409 or visit www.oldstonehousePA.org.Harmony Museum, 218 Mercer St., will host its annual Pumpkin Pancake Brunch from 9 a.m. to 1:30 p.m. Sunday in Stewart Hall. Cost is $10 for adults and $7 for children younger than 10. Guided tours are available from 1 to 4 p.m., for which admission is charged.

PITTSBURGHNational Aviary, 700 Arch St., features creatures of the night at Owl-O-Ween, its annual harvest festival celebration, from 11 a.m. to 3 p.m. Saturday and Oct. 24 and 31. Call 412-258-9445 to register.Children’s Museum, Allegheny Square, hosts “Voyage to Vietnam: Celebrating the Tet Festival” from Saturday through Jan. 17. The museum is open 10 a.m. to 5 p.m. daily. Museum admission is $14 for adults and $13 for children ages 2 to 18 and senior citizens. The program Oct. 23 will include the annual costume contest for children 10 and younger. Visit www.pittsburghkids.org.ToonSeum, Pittsburgh’s Museum of Cartoon Art, 945 Liberty Ave., concludes “Drawn in Pittsburgh” on Sunday. Admission is $8 for those over age 13 and $4 for children ages 6 to 12. Senior citizens, college students, veterans and active military pay $7. Visit toonseum.org.Heinz History Center, 1212 Smallman St., presents the “We Can Do It!” WWII exhibition. Center admission is $15 for adults, $13 for seniors, and $6 for children ages 6 to 17. Admission for active and retired military is $6. Visit www.heinzhistorycenter.org.Carnegie Museum of Natural History, 4400 Forbes Ave., presents the exhibits “Out of This World! Jewelry in the Space Age,” and “Animal Secrets.” Admission is $19.95 for adults, $14.95 for senior citizens, and $11.95 for children ages 3 to 18. Free admission from 3 to 8 p.m. Thursdays in October is made possible by UPMC Health Plan. Visit www.carnegiemnh.org.Carnegie Science Center, North Side, is open 10 a.m. to 7 p.m. Saturdays and 10 a.m. to 5 p.m. Sundays through Fridays. Admission is $18.95 for adults and $11.95 for children ages 3 to 12. Visit CarnegieScienceCenter.org. The center will be closed Sunday and Nov. 1.