Tours of Preston Park in Butler Township, including the residence and the grounds, will begin at 6 p.m. June 19. This walking tour is available at no cost, but registration is required. Call 724-283-3430 to register.

Harmony Museum, 218 Mercer St., will host an Herb & Garden Show & Sale 9 a.m. to 3 p.m. Saturday in the barn on Mercer Street. Museum tours are offered 1 to 4 p.m. daily, except when the museum is closed Mondays. Call 724-452-7341.