Butler County Historical Society will present the third annual “Echoes from Our Past — Historic Cemetery Walk” at 11 a.m. and 2 p.m. Sept. 26 and at 2 p.m. Sept. 27 on the grounds of Butler's North Side Cemetery, 1002 N. Main St. “Echoes from Our Past” brings history to life through costumed actors portraying the characters and events of Butler County's ancestors. Tickets are $14 for the general public and $10 for historical society members and Butler Little Theatre season ticket holders. Proceeds benefit the historical society and the BLT. Tickets are available at www.butlerhistory.com or at the historical society office in the Senator Walter Lowrie House, 123 W. Diamond St., 9 a.m. and 3 p.m. Tuesdays through Fridays.

Mars Shortline Railroad has tiny train rides available. As long as weather allows, adults and children can catch rides from 10 a.m. to 2 p.m. Fridays and 1 to 4 p.m. Saturdays through September at the Mars History and Landmark Society's restored small scale B&O Train Station south of downtown at 1 Brickyard Road. Rides are free, but donations are accepted. Call 724-272-9588 or visit marshistory.org.

The Old Stone House has a bake oven class Sept. 19 and an open hearth cooking class Oct. 10, both from 10 a.m. to 2 p.m. Cost is $35 each, with a two-week advance registration required. Visit http://oldstonehousepa.org/tasteofhistory. The Old Stone House, at the intersection of Routes 8, 528, and 173, is owned and operated by Slippery Rock University.

Harmony Museum, 218 Mercer St., hosts tours from 1 to 4 p.m. daily except when the museum is closed Mondays and holidays. Admission is $7 for adults, $6 for senior citizens, and $3 for youths ages 6 to 17. Call 724-452-7341.

Oil Creel & Titusville Railroad has train rides Saturdays and Sundays in September. The train leaves the Perry Street Station, 409 S. Perry St., Titusville, at 1 p.m. Plan to arrive at least one half-hour prior for boarding. On the three-hour trip, guests can learn about the people and places where oil history began. Call ahead for ticket costs and reservations. Call 814-676-1733.Meadowcroft Rockshelter and Historic Village, Avella, Washington County, is open noon to 5 p.m. today through Saturday and 1 to 5 p.m. Sunday. Admission is $12 for adults, $11 for senior citizens, and $6 for children ages 6 to 17. Call 724-587-3412.

Phipps Conservatory and Botanical Gardens, 700 Frank Curto Drive, continues the Summer Flower Show through Oct. 5. The Butterfly Forest is open through Monday. Hours are 9:30 a.m. to 5 p.m. daily, and until 10 p.m. Fridays. Admission is $15 for adults; $14 for students and senior citizens; and $11 for children ages 2 to 18. Call 412-622-6914.Heinz History Center, 1212 Smallman St., hosts the “We Can Do It!” WWII exhibition. Center admission is $15 for adults, $13 for seniors, and $6 for children ages 6 to 17. Active and retired military pay $6. Visit www.heinzhistorycenter.org.Children's Museum, Allegheny Square, presents “Very Eric Carle: A Very Hungry, Quiet, Lonely, Clumsy, Busy Exhibit” through Sept. 20. Museum admission is $14 for adults and $13 for children ages 2 to 18 and senior citizens. Hours are 10 a.m. to 5 p.m. daily, except the museum will be closed Monday through Wednesday for cleaning. Visit www.pittsburghkids.org.Carnegie Museum of Natural History, 4400 Forbes Ave., Oakland, 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 children ages 3 to 18. Visit www.carnegiemnh.org.Carnegie Science Center, North Side, will have a ROBOTS celebration Sept. 19 in honor of the new giant-screen film opening Friday. A Free Science Day on Sept. 27 will offer free general admission thanks to the Jack Buncher Foundation. The Science Center will be closed on Tuesday. General admission is $18.95 for adults and $11.95 for children ages 3 to 12. Visit CarnegieScienceCenter.org.Fort Pitt Museum in Point State Park presents the exhibit “Captured by Indians.” The museum is open 10 a.m. to 5 p.m. daily. Admission is $6 for adults, $5 for senior citizens, and $3 for children ages 6 to 17, and for retired and active military. Visit www.heinzhistorycenter.org.