Cox Arboretum MetroPark is off I-75 exit 44, e. on Miamisburg-Centerville Rd. (SR 725), then 1 mi. n. on Springboro Pike (SR 741) to 6733 Springboro Pike. This 189-acre reserve provides 3.5 miles of nature trails, a shrub garden, water garden, edible landscape garden, children's boxwood maze, conifer collection, prairie, extensive plant collections, a 46-foot-tall observation tower and a seasonal native butterfly house.
Park daily 8 a.m.-10 p.m., Apr.-Oct.; 8-8, rest of year. Visitor center Mon.-Fri. 8-5, Sat.-Sun. 11-4. Butterfly house open daily 8-8, early July-Labor Day. Closed Jan. 1 and Christmas. Allow 1 hour minimum.