Silver Lake Nature Center is a great little park and center in Bristol, PA near I95 and the PA Turnpike. To find this cache, you'll want to park near the Nature Center building on Bath Road, about 1/4 mi past the entrance to the playround area.
While visiting the center, be sure to stop inside and view the exhibit and the groovy little gift shop. There's an outdoor amphitheater at N40'06.799 W74' 51.699 and an outlook platform at N40'06.808 W74'51.599.
You can get to the cache by staying on the trails except for the last 10 ft. Areas off the trails can get soggy and are rather sensitive.
I updated the coords with Joe C's tip. Hope that helps and hats off to JoeC.