COUNTY

Butler Ghost Walk will be at 7:30 p.m. Friday and Saturday and Oct. 27 and 28 starting from Diamond Park, across from the Butler County Courthouse. Tour guide Bill May takes spectators of all ages on a guided walking tour and tells stories of Sam Mohawk, Ghosts of the Old Hospital, Haunted Elevator, Chinese Laundry Murder, Phantom Civil War Regiment, the Girl Who Heard the Angels Sing, and new this year, “The Ghost of the Penn Theater.” Cost is $10, and reservations are required. Visit www.Butler GhostWalk.com or call 724-256-9026. All children under 18 must be accompanied by an adult.

Old Stone House’s Spooky Stories will be from 5:30 to 8:30 p.m. Oct. 28. Festivities include stories, dramatic readings, face painting, an apple cider press demonstration, candle dipping, and sugar cookie decorating. Admission price is $8 per person, with a cap of $30 for families of four or more. Children under 4 are admitted free. The Old Stone House at the intersection of routes 8, 173 and 528, Brady Township, is owned and managed by Slippery Rock University. Visit www.oldstonehousePA.org or call 724-738-4964.

Maridon Museum, 322 N. McKean St., plans a Harvest Moon celebration on Saturday at Butler Country Club. Cash bar will begin at 5:30 p.m. with hors d’oeuvres at 6 p.m. and dinner stations at 7 p.m. Reservations for the black tie-optional event are $125. Call 724-282-0123.

Harmony Museum, 218 Mercer St., Harmony, has tours that include the 1809 main museum building and wine cellar and a neighboring early 19th century house, both built by the communal Harmony Society, and a Mennonite log house, offered from 1 to 4 p.m. daily, except when the museum is closed Mondays and holidays. Admission is $7 for adults, $6 for age 60 and older, and $3 for ages 6 to 17. Call 724-452-7341.

PITTSBURGH

Carnegie Science Center on the North Side will host ChemFest from 10 a.m. to 3 p.m. Oct. 27 and from 10 a.m. to 4 p.m. Oct. 28. The Miniature Railroad and Village will reopen Nov. 20 with a new installation. The Science Center will be closed Sunday. Hours for fall and winter are 10 a.m. to 5 p.m. daily. Regular admission is $18.95 for adults and $11.95 for children ages 3 to 12; films are extra. Call 412-237-3400 or visit CarnegieScienceCenter.org.