The Clayton Museum of Ancient History at York College in York will be closed from July 18-27 for maintenance.
The Ash Hollow State Historical Park Visitors Center is open Tues-Sun 9am-4pm from May 23 to Sept. 7. When closed, you can receive your stamp at: The Most Unlikely Place, 205 Main St. in Lewellen, Wed-Sat 9am-2pm.
You can receive your stamp Wed-Sat 10am-4pm (last tour is at 4pm); Sun 12-3pm (last tour is at 3pm). Tours last one hour.